Is there a more formal recommendation for social security payment in Zhengzhou?

I think before choosing, we can see if their company has the qualification of social security payment, whether it has a fixed office location and whether the three certificates are complete. Zhengzhou Gaoxin Manpower and Zhengzhou Pratt & Whitney Manpower, which have developed for many years, have nothing to say about their services and word of mouth. Are all good choices.