Construction
| Tue 27 Oct 2026
Beijing, Oct. 26 -- Yunnan Construction & Invest Holding Group has been granted a patent for Ultra-large Karst Cave Arch Protection Structure of Highway Tunnel. Hei Zhengguang, Chen Zhi, Jiang Baoxi, Wang Taiping, Li Qichao, Duan Jun, Yin Hongyue, Yang Jie, Li Bingnan, Zhao Jinhong, Ding Jiannan, Chen Jihong, Li Gang, Yang Hongb..