How to get 2 visa for 2 person of my company? They need to go to China for strarting bussines with China's company.

You need to apply for a F-visa with the following requirements:
1) passport valid for more than six months before expiration and at least one blank page in it
2) complete application form (Form V2011A )
3)one recent passport
4) the official invitation letter from authorized Chinese departments
5) other necessary requirments asked by the embassy

It usually takes 4 working days for you to get the visa. But if they offer the Express or rush service, you may get it in 2 or 3 working days. Please note that even if you submit all the deemed necessary requirements, you may get refused without no reason.