Only multiple entry visa has the validity of 1 year or 2 year, but the duration period of the multi-entry visa is usually 60 days, that is to say even if you apply for a multi-entry visa fro i year or 2 year, you still have to leave china after the 60 days' stay.
You can apply for a Permanent Residence Permit if you want to stay in China for a long time. See the details on the website below:
https://www.travelchinaguide.com/embassy/visa/refusal.htm