Shanghai Tianhao Industrial Co., Ltd. has signed a strategic cooperation agreement with Shaanxi Construction Steel Structure Co., Ltd. in Xi 'an on July 1, 2021.

On August 17th, with the cutterhead of the "Shanhe" shield machine with a diameter of 17.5 meters breaking through the ground, the shield section of the Yellow River Tunnel on Huanggang Road in Jinan City, invested and constructed by Jinan Urban Construction Group and undertaken by China Railway 14th Bureau Group, was successfully excavated. This world's largest diameter underwater shield tunnel was successfully connected.

On September 14th, the double-track shield tunneling of the Lingkong North Road Station - Gaoling Middle Ventilation Shaft section and the vehicle depot entry and exit Line - Lingkong North Road Station section of the 105th contract of the first phase of Shanghai Metro Line 22 (Chongming Line) was successfully completed.