Guangzhou Metro Line 21 Underground Section

Guangzhou Metro Line 21 starts from Tianhe District, Guangzhou in the west, passes through Huangpu District, and ends at Zengcheng Square, Zengcheng District. The total length of the line is 61.6 kilometers, including 40.1 kilometers of underground line, 6.8 kilometers of mountain tunnel and 14.7 kilometers of overground line. Among them, the underground section construction method, structure type is diverse, the design technology standard is high, the use of fast and slow car operation, representing the advanced development level of China's urban underground rail transit.

Suyuan ~ Zhenlongnan, Zhongxin east ~ Xiangling underground structure design and consultation, total length 27km.