It is likely that a PRC governmental regulator can require the production of a document that falls within the scope of confidential communications between a qualified lawyer and their client. However, this will depend on the specific circumstances and issues involved.
There are certain variations among the PRC government bureaus as to the interpretation and enforcement of PRC laws and regulations. In most cases, government bureaus, in particular regulatory authorities, will not respect a confidentiality obligation claimed by a lawyer in relation to their client.