am from other country and am in India now and I need visa to go to china for trade activities

If you have an invitation letter from your trade partner in China, you can try to apply for a business M type.
First thing is to prepare the relevant materials: your passport and its photocopy, the application form, a half-length color photo, and the invitation letter from trade partner, as well as your valid visa or residence permit in India.
Second, submit the application to the CVASC to apply for it.