China government procurement network shows that the supervision of Northeast Black Land Protection Project needs to be reported, including a copy of business license, a copy of qualification certificate, a copy of supervision engineer's qualification certificate, a copy of labor contract or social endowment insurance, a power of attorney of legal representative and the original ID card of the authorized person.
Black soil is the most fertile soil in the world. There is a metaphor of two oils in one soil, which is mainly distributed in Heilongjiang Province, Jilin Province, Liaoning Province and Inner Mongolia Autonomous Region in China.