Currently in BI China, user can send more than 4 documents to an HCP at one time via approved Wechat.
The expected behavior is as below:
The number of documents sent at on time should be controlled by MESSAGE LIMIT custom setting.
If MESSAGE LIMIT is set to DAY:4, the user shouldn't send more than 4 documents to an HCP at on time.
Reference: BISM ticket 8397174