It is an important form of organized, prepared, planned and evaluated papers. Zhejiang erjian construction group co., ltd. is a special-grade enterprise of housing construction general contracting of the Ministry of Construction. The defense of Zhejiang Erjian is an important form of organized, prepared, planned and evaluated papers. Zhejiang erjian has a number of qualifications, such as the first-class general contracting of construction projects, the first-class design of construction projects, and the first-class general contracting of municipal public works.