A local apparatus is configured to perform resolution on a conflict field generated by code files of a plurality of versions, and send a conflict resolution result to the service apparatus. The conflict field includes at least one conflict block, and the conflict resolution result includes at least one of a resolution result of a local resolvable conflict block and an identifier of a local irresolvable conflict block. The remote apparatus is configured to obtain the conflict resolution result from the service apparatus, generate a collaborative processing window based on the conflict resolution result, and receive a result of processing the conflict resolution result by a remote user based on the collaborative processing window.