China latest patents query

The latest invention patents collect the data information of China invention patents from 2000 to 2024, typesetting according to the date of patent publication, including patent number, application date, invention Bibliographic data, abstracts, and specification data of people are convenient for scientific researchers to quickly browse and search for patents.

Efficient high-frequency amplifier and radio transmitter

InactiveCN100423456CScale upReduce component countMultiple-port networksHigh frequency amplifiersAudio power amplifierLow-pass filter

Owner:MURATA MFG CO LTD

Photoelectric conversion devices and their applications

ActiveCN104868045BSimple structureLow costThermoelectric device with peltier/seeback effectNanoinformaticsThermal energyLight energy

Owner:TSINGHUA UNIV +1

Method for monitoring wafer defects by defect detection machine

ActiveCN110581082BReduce mistakesAvoid the risk of photoresist being damagedSemiconductor/solid-state device testing/measurementWaferEngineering

Owner:SHANGHAI HUALI INTEGRATED CIRCUIT CORP

Combustion system and method for high-power lean-burn natural gas engine based on ozone combustion

ActiveCN108644034BLower activation energyEasy to igniteElectrical controlNon-fuel substance addition to fuelCombustion chamberIntercooler

Owner:SHANDONG UNIV

Shape memory low temperature high shrinking film and its preparation method

InactiveCN100486874CNo pollution in the processReduce processing difficultyFlexible coversWrappersNanotechnologyRaw material

Owner:朱家牧

Neramexane for the treatment of nystagmus

InactiveCN101677974ASenses disorderNervous disorderPharmaceutical medicinePerylene derivatives

Owner:MERZ PHARMA GMBH & CO KGAA

Apparatus and method for measuring polarization-dependent loss using repeated high speed polarization scrambling

InactiveCN1214258CHigh measurement accuracyFast measurementPolarising elementsLight polarisation measurementOptical polarizationOptical detector

Owner:DONAM SYST INC

A multi-sealing, corrosion-resistant, leak-finding and plugging integrated oil recovery packer

ActiveCN110043217BPlay an auxiliary heating roleSealing/packingEngineeringOil production

Owner:淮安市井神钻采机具有限公司

Modafinil compositions

InactiveCN1980888BOrganic active ingredientsOrganic chemistrySolubilityMedicine

Owner:CEPHALON INC

A speed sensorless vector control system and method for a high-speed flywheel

ActiveCN109861615BEffective estimateAccurate control of current amplitudeElectronic commutation motor controlVector control systemsMotor speedSynchronous motor

Owner:中冶赛迪电气技术有限公司

A Reservoir Availability Forecast Method Based on Improved Quantum Grey Wolf Algorithm

ActiveCN111724004BIncrease diversityFast convergenceKernel methodsForecastingHydrometryModel parameters

Owner:ZHEJIANG UNIV

Taxol freezing-dried emulsion for injection and preparation method thereof

InactiveCN101099733BLow toxicityEnsure safetyOrganic active ingredientsSolution deliveryEmulsionMedicine

Owner:SHANGHAI INST OF MATERIA MEDICA CHINESE ACAD OF SCI

Method for measuring pressure water absorption rate of lightweight aggregate concrete

ActiveCN101629889BNo cloggingWeighing by absorbing componentStructural engineeringCement slurry

Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD

Device for preventing ankle sprains and method of use thereof

InactiveCN103182146BConvenient stimulation electrode positioningPrecise positioningArtificial respirationPhysical medicine and rehabilitationSkin surface

Owner:THE HONG KONG RES INST OF TEXTILES & APPAREL

A method for near-net-shaping al2o3 ceramic structural parts by laser

ActiveCN104015244BHigh quality and precisionHigh dimensional accuracyCeramic shaping apparatusNumerical controlUltrasonic vibration

Owner:DALIAN UNIV OF TECH

A kind of composite cemented pavement pavement material and using method thereof

ActiveCN104724992BIncrease elasticityImprove interfacial bond strengthIn situ pavingsSolid waste managementEpoxyOrganic solvent

Owner:山西省交通科技研发有限公司

Method, terminal and television broadcast server for sending request from triggering terminal to mobile server

InactiveCN101499901BImprove reliabilityGet normalSelective content distributionComputer networkComputer science

Owner:CHINA MOBILE COMM GRP CO LTD

Multi-output electronic ballast

InactiveCN102711346BReduce volumeDoes not take up spaceEfficient power electronics conversionAc-dc conversionControl signalHigh-voltage direct current

Owner:DELTA ELECTRONICS INC

Show control method and device

InactiveCN106201209BImprove the display effectEasy to useInput/output processes for data processingHuman–computer interaction

Owner:ALIBABA (CHINA) CO LTD

Self-unloading soil pick-up roller

ActiveCN110199595BSmall structure sizeReduce energy consumptionGatherer machinesSoil scienceStructural engineering

Owner:SHIHEZI UNIVERSITY

Methods of enhancing stem cell differentiation into beta cells

PendingCN112074281AMetabolism disorderPancreatic cellsEpigenetic ProfileBeta cell

Owner:VERTEX PHARMA INC

Tech. of preparing 2,4-di nitro methyl-phenoxide by nitro methyl-phenoxide continuous thermal insulating nitration

InactiveCN100361957CReduce manufacturing costReduce processing costsNitro compound preparationEvaporationNitration

Owner:CHANGZHOU JIASEN CHEM +1

An electric heating asphalt special container tank

ActiveCN104029948BEvenly heatedReduce weightTank wagonsElectricityCombustion

Owner:陕西国础实业股份有限公司

Display device including degradation compensation device

PendingCN111599310ADeterioration AccurateStatic indicating devicesComputer graphics (images)Display device

Owner:SAMSUNG DISPLAY CO LTD

Vehicle and curve assisting control method thereof

ActiveCN109733354BSignalling/lighting devicesBraking systemsControl theoryMechanical engineering

Owner:BAIC MOTOR CORP LTD

Broadband wave absorbing material based on frequency selective surface

ActiveCN102769209BGood absorbencyWaveguide type devicesAntennasBroadbandReflective layer

Owner:KUANG CHI INST OF ADVANCED TECH

A hot stamping machine waste film winding device

ActiveCN111977422BReduce workloadHigh degree of automationArticle deliveryWebs handlingEngineeringMachine

Owner:桐乡市佳峻纺织股份有限公司

Micro-movement table and motion device

ActiveCN112259488BSolve problems such as shortened lifespanSemiconductor/solid-state device manufacturingThermal deformationEngineering

Owner:YINGUAN SEMICON TECH CO LTD

Steering hydraulic pumps for heavy-duty vehicles in emergency situations

ActiveCN111186483BEnsure safetyEffective steering boostFluid steeringAutomatic steeringControl engineering

Owner:SHANDONG JIAOTONG UNIV

A five-level classification method and system for information risk level

ActiveCN107451710BFulfill the purpose of searchEffectiveFinanceWeb data indexingRisk levelClassification methods

Owner:BEIJING DINGTAI ZHIYUAN TECH CO LTD

Winding device for thermal insulation film of automobile glass

ActiveCN106629166BImprove winding efficiencySimple structureWebs handlingReducerEngineering

Owner:浙江新铭隆科技有限公司

Preparation method of La-doped W-Cu composite powder

ActiveCN102389971BHigh sintering activityHigh degree of densificationLiquid/solution decomposition chemical coatingPhysical chemistryCopper oxide

Owner:HEFEI UNIV OF TECH

A kind of polybutylene succinate resin composition and preparation method thereof

ActiveCN103382296BIncrease productivityImprove heat resistanceElastomerGlass fiber

Owner:BEIJING RISUN TECH CO LTD

Method for recombining IP message

InactiveCN100512217CSimplified Reorganization Implementation MethodLow costData switching networksIP fragmentationComputer science

Owner:HUAWEI TECH CO LTD

A small cutting mechanism dedicated to circuit boards and its application method

ActiveCN108012428BSolve cutting problemsAvoid skewPrinted circuit manufactureProcess engineeringMechanical engineering

Owner:SHANGHAI NCATEST TECH CO LTD

Testing device for bearing inner diameter

ActiveCN112212821BImprove detection efficiencyEffective gripMeasurement devicesEngineeringSlide plate

Owner:INST OF LASER & OPTOELECTRONICS INTELLIGENT MFG WENZHOU UNIV

Organic thin film transistor

ActiveCN100573955CFinal product manufactureSolid-state devicesDisplay deviceOrganic semiconductor

Owner:SAMSUNG DISPLAY CO LTD

Oil palm seed pregermination method

InactiveCN102301849BBreak dormancyGerminate fastSeed and root treatmentCold treatmentFiber

Owner:RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI

Method for producing coal ash foam concrete block and coal ash foam concrete block produced by same

InactiveCN101856836BHigh strengthLow costCeramic shaping apparatusFoam concreteBrick

Owner:新疆生产建设兵团第五建筑工程有限责任公司 +1

motor control unit

ActiveCN107251412BReduce switching timesReduce high harmonic lossAC motor controlElectric motor controlSignal waveHigher order harmonics

Owner:HITACHI IND EQUIP SYST CO LTD

Safety valve performance test and online calibrator calibration device

InactiveCN105699068BQuick Test Reseating PressureQuick Test EmissionsMachine valve testingEngineeringHigh pressure

Owner:HANGZHOU SPECIAL EQUIP INSPECTION & RES INST

A detection device and detection method for electronic products

ActiveCN110296804BGuaranteed integrityImprove qualityVibration testingShock testingStructural engineeringMechanical engineering

Owner:安徽聚颍精密制造有限公司

A supporting device with good leveling effect for the processing of the middle body of a high-speed precision punching machine

ActiveCN110281568BReduce flatness requirementsGuaranteed horizontal placement accuracyPressesPunchingStructural engineering

Owner:海盐永丰精密五金有限公司

Preparation method of silicon carbon-carbon nanotube composite microsphere negative electrode material for lithium ion battery

ActiveCN110137466BImprove conductivityImprove cycle lifeCell electrodesSecondary cellsCarbon layerSilicon oxide

Owner:山西北科乾通储能科技研究院有限公司

Integrated small nv color center solid-state magnetometer and its manufacturing process

ActiveCN108732518BFor maximum integrationEfficient collectionMagnetic field measurement using magneto-optic devicesSingle device manufacturingResonant cavityManufacturing technology

Owner:ZHONGBEI UNIV

A Method for Solving Feature Extraction Tasks Using Image Regularization and Data Reconstruction

ActiveCN108363724BDigital data information retrievalSpecial data processing applicationsFeature extractionData reconstruction

Owner:ZHEJIANG UNIV

Atmosphere alteration method, and air spray and spray device used therefor

InactiveCN101039664AOrganic active ingredientsNervous disorderSolventAtmosphere

Owner:DAIKIN IND LTD

A bovine serum albumin-multifunctional factor complex

ActiveCN106420700BGood storage stabilityDoes not affect bindingCosmetic preparationsHydroxy compound active ingredientsNeutral phAlcohol

Owner:JIANGNAN UNIV

A kind of chitosan and polybenzyl glutamate graft copolymer and preparation method thereof

InactiveCN103834036BPharmaceutical non-active ingredientsAntineoplastic agentsAfter treatmentEnd-group

Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

A kind of preparation method of refined edible salt

ActiveCN109261278BImprove grinding effectImprove efficiencyGrain treatmentsProcess engineeringIndustrial engineering

Owner:阜阳市艺凯农业科技有限公司

An electrospinning device for preparing nanofibers

ActiveCN105525366BAvoid pollutionNo pollution in the processFilament/thread formingFiberControl system

Owner:昆山同日机器人智能科技有限公司

A detection method for internal defects of large bearing rings

ActiveCN110108796BReduce processing allowanceCompression processing allowanceAnalysing solids using sonic/ultrasonic/infrasonic wavesComputational physicsUltrasonic testing

Owner:LUOYANG LYC BEARING

Motor rotor silicon steel sheet to improve structural strength

ActiveCN105990921BImprove structural strengthReduce weightMagnetic circuit rotating partsStructural engineeringUltimate tensile strength

Owner:ATECH TOTALSOLUTION

Exhaust gas filter of dust collector

InactiveCN101596085BAvoid closingEliminate hidden dangers of misuseSuction filtersEngineeringStructural engineering

Owner:NANJING LG PANDA APPLIANCES

Method for efficiently recycling ferro-aluminium from bauxite tailings and synchronously preparing high siliceous residues

InactiveCN103421960BOperationalDischarge fullyProcess efficiency improvementPregnant leach solutionSulfate

Owner:KUNMING UNIV OF SCI & TECH

Reentry flight attack angle guiding method of sub-orbital vehicle

ActiveCN102139768BAchieve dynamic balanceTo achieve the purpose of guidanceSpacecraft guiding apparatusDynamic balanceFlight vehicle

Owner:广东空天科技研究院

A kind of encapsulation method and device of network layer icd

ActiveCN106874009BImprove work efficiencyReduce workloadTransmissionCreation/generation of source codeWorkloadBus

Owner:BEIJING RUNKE GENERAL TECH

Aircraft with tail split multi-deck fuselage and method for transforming it

ActiveCN104417747BWeight reductionFuselagesMechanical engineeringAirframe

Owner:THE BOEING CO

Portable air purifier based on traditional Chinese medicine membrane

InactiveCN103697541BEasy to installEasy cycle purificationLighting and heating apparatusSpace heating and ventilation detailsEngineeringAir purifier

Owner:CHENGDU HEXU MEDICAL TECH CO LTD

Oral mucosa scrape

InactiveCN100415176CEasy to collectImprove elutionSurgical needlesElutionDentistry

Owner:江建华

Cyp2c9 gene fragment including 389c>t mutation, encoded protein fragment and application thereof

ActiveCN103031314BMicrobiological testing/measurementOxidoreductasesBase JAllele-specific oligonucleotide

Owner:蔡剑平

A medium access control method for intensive aquaculture Internet of things with low power consumption

ActiveCN103338203BImprove detection reliabilityNode energy loss is excellentEnergy efficient ICTTransmissionNode clusteringAquaculture

Owner:TIANJIN AGRICULTURE COLLEGE

Steel rim concrete

ActiveCN102010158BLow costIncrease economic income modelSolid waste managementMaterials scienceCement

Owner:福建省大岩电子科技有限公司

A system of landscape lighting system based on wireless energy transmission

ActiveCN111342507BEnable wireless chargingSave wireBatteries circuit arrangementsEnergy saving control techniquesTransmitter coilWireless transmission

Owner:HUBEI UNIV FOR NATITIES +1

A kind of stripping method of diaspore type bauxite

ActiveCN112158869BAdd lessHarm reductionAlkali-metal aluminates/aluminium-oxide/aluminium-hydroxide preparationMining engineeringDiaspore

Owner:CENT SOUTH UNIV

Deformable soft spherical modular robot

ActiveCN104924305BSimple structureEasy to detectProgramme-controlled manipulatorSolenoid valveControl system

Owner:SHANGHAI JIAOTONG UNIV

Catalytic complex for preparing isocyanurate foam from bagasse ployol

InactiveCN1271106CAdjustable speedPlay evenlyAlcoholPolyol

Owner:GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI

An anti-lodging liquid food delivery device

ActiveCN110834661BPrevent lodgingAvoid leaningSupporting partsVentilationHydraulic cylinderLiquid food

Owner:南京润圻机械科技有限公司

Method for manufacturing hand-knitting suspension rope and hand-knitting suspension rope

ActiveCN1844562BOperational securityThere will be no cutsBinding endsRope making machinesEngineeringCable harness

Owner:STAS

A manual grinding tool for Chinese herbal medicine

ActiveCN108212481BImprove grinding efficiencyImprove work efficiencyRotating receptacle mixersTransportation and packagingWorking pressureEngineering

Owner:南通江涌投资开发有限公司

Early warning method of overhead transmission line lightning strike flashover

ActiveCN102426301BRealize lightning flashover phenomenonReasonable ideaCurrent/voltage measurementElectrostatic field measurementsLightning strikeComputer science

Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST

An evaluation method of power grid transient voltage stability based on misclassification cost classification learning

ActiveCN105139289BRaise biasReduce the possibility of misjudgmentData processing applicationsWeight coefficientEngineering

Owner:TSINGHUA UNIV +1

A gis-based method for establishing a non-parametric river network model

InactiveCN105653792BReduce the numberImprove applicabilitySpecial data processing applicationsRiver networkComputer science

Owner:SICHUAN UNIV

A kind of support for artificial cornea and preparation method thereof

ActiveCN113117146BEasy dischargeReduce forward movementTissue regenerationProsthesisCell-Extracellular MatrixBone tissue

Owner:THE FIRST MEDICAL CENT CHINESE PLA GENERAL HOSPITAL

Embedded safety lift

ActiveCN104401848BReduce manufacturing costReduce use costElevatorsBuilding liftsEmbedded securityEngineering

Owner:SHENZHEN SHENGSHI ELEVATOR CO LTD

A Method for Determining the Optimal Scheme of Making Regenerated Aggregate Products

InactiveCN109678375BExperiment volume increasedTaking care of ambiguitySolid waste managementDesign optimisation/simulationAggregate (composite)Process engineering

Owner:KUNMING UNIV OF SCI & TECH

Pneumatic tire and tire cure metal mold

InactiveCN109760240AReduce trapped airSuppression of molding defectsOff-road vehicle tyresTyresVulcanizationEngineering

Owner:TOYO TIRE & RUBBER CO LTD

Placing cabinet convenient for tracking remote controller

InactiveCN114601276AImprove visibilityImprove applicabilityWing fastenersFurniture partsControl theoryMechanical engineering

Owner:EAST CHINA JIAOTONG UNIVERSITY

A Composite Control Method for Aircraft Front Wheel Electric Steering and Swing Reduction

ActiveCN110435881BSimple structureReduce weightAC motor controlWeight reductionLoop controlDamping torque

Owner:LANDING GEAR ADVANCED MFG

A test method for the selection of torsion springs for aircraft

ActiveCN109100244BRobust Design MethodMachine part testingMaterial strength using repeated/pulsating forcesTorsion testTorsion spring

Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA

Photon -state microwave meter -state converter and system based on microwave co -surface waveguide

InactiveCN110535006BAchieve conversionSimple structureSolid masersCapacitanceCapacitive effect

Owner:温州市懒代贸易有限公司

A collaborative caching method based on lightweight blockchain in the Internet of Vehicles environment

ActiveCN110535687BMaximize utilizationLower latencyData switching networksSource Data VerificationThe Internet

Owner:DALIAN UNIV OF TECH

A Flapping Wing Mechanism Combining Electromagnetic Drive and Rope Drive

ActiveCN109050912BAvoid mechanical propertiesAvoid energy lossOrnithoptersFlapping wingGear wheel

Owner:BEIHANG UNIV

System and method for continuous removal of impurities from solvent benzene in a caprolactam extraction process

ActiveCN107216274BReduced extinction valueExtended operating cycleLactams separation/purificationBenzenePhysical chemistry

Owner:HUBEI SANNING CHEM

Non-mechanical snorkeling float structure

ActiveCN102556287BWaterborne vesselsBuoysElectrolysisBuoy

Owner:SHANGHAI MOSES MARINE ENG

A data separation storage display method and device based on indexeddb storage

ActiveCN114116731BReduce disk pressureSpecial data processing applicationsDatabase indexingDatabaseRecord

Owner:北京智象信息技术有限公司

A flexible circuit board and self-capacitive touch display

ActiveCN106775170BSmall sizeMeet market demandInput/output processes for data processingCapacitanceFlexible circuits

Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD

Multi-effect siphon phase-change circular heat transfer system

InactiveCN103292308BLow boiling pointFast starting and heating upFeed water supplyEnergy industrySiphonCavitation

Owner:HAIMEN ZHUOWEI TEXTILE CO LTD

Organic-inorganic hybridization three-order non-linear optical crystalline material and synthetic method thereof

InactiveCN102212879BThe synthesis method is simpleRaw materials are easy to getPolycrystalline material growthNon-linear opticsWater bathsFiltration

Owner:BEIJING UNIV OF CHEM TECH

Fluorgypsum based inorganic thermal mortar

InactiveCN102584156BReduce processing timeReduce occupancyFiberCellulose

Owner:上海英硕聚合材料股份有限公司

An organochlorosilane saturated acid hydrolysis device and process

ActiveCN111454454BReduce usageLow viscositySilicon organic compoundsGas treatmentAcid hydrolysisAcid washing

Owner:ZHEJIANG JINGGONG NEW MATERIAL TECH

Circuit breaker

ActiveCN101978460BEasy to operateAdjust the pivot angleSwitching device condition indicationSwitches with electrothermal and electromagnetic releaseCircuit breakerAngular range

Owner:MATSUSHITA ELECTRIC WORKS LTD

Resource method of deposed salt slag or heavy metal sewage sludge and its private facilities

InactiveCN100558663CHarm reductionSolid waste disposalSludge treatment by pyrolysisFiltrationSludge

Owner:NANJING UNIV

A kind of automobile gear control method and system

ActiveCN113154027BAvoid secondary damageGearing controlDriver/operatorControl engineering

Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

Vehicle-mounted water hydrogen machine methanol water raw material supply and distribution method and system

ActiveCN109638316BGuaranteed continuityReactant parameters controlMethanol waterEnvironmental engineering

Owner:德州新动能铁塔发电有限公司

Composite fungus powder product for fermented pickle production and its production method

ActiveCN102965295BLess investmentKeep the flavorFungiBacteriaBiotechnologyLactobacillus rhamnosus

Owner:湖北华贵食品有限公司

Software version management method for network element management system based on file mode

ActiveCN101370221BAvoid interactionCentralizationData switching networksNetwork data managementElement management systemNetwork management

Owner:盐城永安科技有限公司

In situ synthesis TiC particle reinforced titanium-aluminum-vanadium-molybdenum alloy material and preparation method thereof

ActiveCN102864335BGood plasticityImprove organizationAlloyBall mill

Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Method and device for security protection based on nginx

ActiveCN107493279BReduce development costsReduce maintenance costsTransmissionClient-sideComputer security

Owner:深圳市慧择时代科技有限公司

Method and system for cross-modal retrieval of multimedia data using tag hierarchy information

ActiveCN111930972BQuality assuranceDigital data information retrievalNeural architecturesFeature extractionData mining

Owner:SHANDONG UNIV

A basic processing method of a stone -throwing sea bed ground steel pipe pile pile

ActiveCN110029653BSmooth crossingReasonable forceBridge erection/assemblyCaissonsBridge deckAbutment

Owner:CHINA CONSTR SIXTH ENG BUREAU CIVILENG +1

A kind of heat-conducting silicone adhesive and its cured product and led element

ActiveCN109880583BImprove thermal conductivityNon-macromolecular adhesive additivesSemiconductor/solid-state device detailsPlatinumPolymer science

Owner:BEIJING KMT TECH

Pressure Staging in Continuously Variable Transmissions

ActiveCN105485327BGearing controlActuatorControl theory

Owner:GM GLOBAL TECH OPERATIONS LLC

Intelligent tester for concrete permeability

InactiveCN100498325CIncrease volumeAvoid measurement errorsSurface/boundary effectMaterial analysis by electric/magnetic meansObservational errorGraphite electrode

Owner:HARBIN INST OF TECH

A method for preparing dephenolized oil and phenolic resin from medium and low temperature coal tar

InactiveCN103289718BHigh purityReduce consumptionTar working-up by chemical refiningTar working-up by solvent extractionBenzeneProcess engineering

Owner:NORTHWEST UNIV

An antibacterial hand wipe

ActiveCN105362141BAchieve cleansing and moisturizing effectAvoid harmCosmetic preparationsToilet preparationsActive componentPreservative

Owner:锦励(上海)医疗科技有限公司

A device and method suitable for over-temperature adjustment of a Stirling engine heating tube

ActiveCN110206658BReduce the temperatureEnhanced radiation heat transferThermometer detailsHeater tubesSolenoid valveStirling engine

Owner:AECC AVIATION POWER CO LTD

A kind of carbon-containing supported bimetallic catalyst and its preparation method and glycerin hydrogenolysis reaction method

ActiveCN108654613BHigh activityHigh selectivityHeterogenous catalyst chemical elementsCatalyst activation/preparationPolymer sciencePtru catalyst

Owner:CHINA PETROLEUM & CHEM CORP +1