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 December 22, after more than 10 hours of pouring operations, the first floor of the Jiangnan section of the Haitai Yangtze River Tunnel was poured, officially opening the prelude to the construction of the main structure of the Jiangnan section.
On November 25, "the first rail tunnel in the Upper reaches of the Yangtze River", the whole section of Chongqing Rail Transit Line 27 cross-river tunnel was accurately connected.
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