Hello, I also do integration projects, our company has a first-class qualification. The maximum amount of single business is not directly related to your qualification. Only in the procurement office bidding time will have the qualification requirements, however, generally on the 3 million projects are required to computer level 2 qualification above. You can take the largest business depends on your company's liquidity and human resources and other factors, if these are sufficient, how much of the project you can take!