China Business Visa Expiry

Hi, I am a UK national and my business M is from 22 September 2016 - 22 September 2018 (with multiple entry every 90 days).

If I enter China before 22 September 2018, can I stay for 90 days from that date onwards (even after my visa expires)?

For example, if I enter on 5 September 2018, could I leave on 3 October 2018?

Thanks!