"Guangdong-hong kong-macao greater bay area underground space conference and the fifth (shenzhen) urban underground space and integrated pipe corridor technology innovation forum" will be held in shenzhen from December 5 to 6, 2019. Leaders of shenzhen municipal housing and construction bureau, academician zhou fulin of Chinese academy of engineering, academician wang fuming and guests of relevant enterprises attended the forum.

Following the successful exit of the "tiebing no. 1" shield tunneling machine, "tiebing no. 2", the last shield tunneling machine in charge of the construction of metro line 22 from qi-fu to guangzhou south railway station (hereinafter referred to as "qi-guang section"), also completed the construction task successfully on May 18, marking the completion of the double-line tunnel in this area. This is the longest shield range on the whole line and the first to realize the connection between the two tunnels.