Embodiments of this specification disclose methods, apparatuses, and computer systems for performing request conversion between
resource management systems. The method includes: A first
resource management system generates a first request packet in a first communication format. A first field in a packet header of the first request packet indicates that the first request packet is used to request an authorized freeze on a resource, and a packet body of the first request packet includes a number ID of a to-be-executed
resource transfer operation and a first token. The first
resource management system sends the first request packet to an interchange
system in response to determining that the first token belongs to a predetermined type. The interchange system parses the first request packet, extracts the number ID and the first token from the first request packet, determines, by querying a first data
record, a first account in a second
resource management system corresponding to the first token, generates a second request packet in a second communication format based on an API specification of the second
resource management system, and sends the second request packet to the second
resource management system. The second request packet is used to call a target API, and a call parameter field of the second request packet includes the number ID and the first account. The second resource
management system parses the second request packet based on the API specification, extracts the number ID and the first account from the call parameter field, and executes a target operation of a function corresponding to the target API on the first account.