What are the second-class petrochemical construction qualification companies in Xining?

1. Qinghai Luoyang Construction Group Co., Ltd.: Established in 1994, it is an enterprise engaged in construction, real estate development and rail transit engineering.

2. Qinghai Construction Engineering Co., Ltd.: Established in 1993, it is a comprehensive construction enterprise with a number of petrochemical professional qualifications.

3. Qinghai China Resources Construction Co., Ltd.: Founded in 1989, its main business includes construction engineering, decoration and real estate development.

4. Qinghai Xinghua Construction Co., Ltd.: Established in 1998, it is an enterprise specializing in petrochemical and aquaculture construction.