Xizang Airport Expressway, downward spiral pile casing excavation. Although the local geology is poor and it was difficult to construct in the past, in order to respond to China's development strategy and identify Yunnan, Guizhou, Sichuan, Xizang and Xinjiang as the main development direction in the future, our company actively cooperates with the national strategy to participate in the cause of technological innovation. This time, we achieved great success and won the construction at one fell swoop.
