There are three types of patent under the current Chinese Patent Law:

Patent for Invention: 20 years from the date of filing the application in China, subject to the payment of annual fees, no extension.

Patent for Utility Model: 10 years from the date of filing the application in China, subject to the payment of annual fees, no extension.
Patent for Design: 10 years from the date of filing the application in China, subject to the payment of annual fees, no extension.