Can i get 60 days chineese business visa for first time entry ?

You need to provide your passport and copy of its data page, the application form affixed with a half-length color photo, and the invitation letter.
If you actually need 60 days, the consular officers may give you what you want according to your business travel itinerary.
If you cannot get 60 days in the end, you can try to apply for an extension after enter PRC. Just extend the M type 7 days prior to its expiry date and then you can possibly get another 30 days. There is no need to worry!