If your client's PCT patent application specifies China and enters China, and after actual examination, it is considered that there are no other formal problems, according to the relevant provisions of Article 9 of the Patent Law-two identical inventions and creations, the patent right shall be granted to the person who applied first. But because your patent has been authorized, the examiner will ask your client to go to the Patent Reexamination Board to make an invalid request for your patent. After the invalidation request is passed, your patent is invalid and his patent is authorized.
Tell you so much for the time being. If you don't understand anytHIng, you can contact hi or stand short.