The following is based on a translation of an article on a Chinese news site:
An article on war.163.com says that China is digging a tunnel and storage cave deep undersea.
According to media report, due to the depth and the thick mud layer, Asia’s largest hydraulic dredge is used to dig out 160,000 cubic meters a day.
PLA 92304 Regiment is digging the tunnel.
As the tunnel is dug out of seriously weathered quartz-sandstone, the regiment can dig only one metre a day.
The location of the tunnel is a well-guarded secret, but as only the South China Sea is deep, and as there is seriously weathered quartz-sandstone in Guangdong and Hainan, there is speculation that the tunnel is located in the South China Sea.
92304 Regiment is a navy unit stationed in Guangdong and Hainan.
Source: war.163.com “PLA conducting a mystic construction project in a certain sea area: digging an underground tunnel” (summary by Chan Kai Yee based on the report in Chinese)
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