The winning bidder for slope protection of Yanghe tributary in Cao Xian County is not China Railway 12th Bureau. There is a slope protection project in Cao Xian County, Heze City, Shandong Province, which is more than 100 kilometers away, and it was won by China Construction Seventh Bureau.

With the development of modernization, ecological slope protection technology has become the key technology of water conservancy projects. With the continuous progress and improvement of application measures, the function of river ecological slope protection is more and more comprehensive, and its stability is greatly improved. Through the construction of perfect ecological slope protection project, flood control and drought resistance can be effectively achieved.