What are the biggest bidding companies in Xi 'an? It, thank you!

Shaanxi Procurement Tendering Co., Ltd. (has offices in the stadium and Shaanxi Securities Building, but some projects that need to be filed in the security engineering construction center will go to Qujiang. Generally, many projects are now in their hands), as well as Shaanxi Tendering Co., Ltd., Shaanxi Zheng Da Tendering, Shaanxi Longhuan Tendering, Shaanxi Zheng Heng, Shaanxi Sigma Engineering Cost Consulting Co., Ltd. and Northwest International Tendering. These should be more common.