What if the patent right is declared invalid?

Where the patent right is requested to be declared invalid or partially invalid, the applicant shall pay the fee in accordance with the regulations, submit a request for invalidation in duplicate, fill in the name and patent number of the patent requested to be declared invalid, state the facts and reasons on which it is based, and attach the necessary evidence. If a party refuses to accept the decision on the request for invalidation of a patent, he may bring a suit in a people's court within 3 months from the date of receiving the notice. The patent office shall register and announce the decision after it becomes legally effective. An invalid patent right shall be regarded as nonexistent from the beginning.