First undersea tunnel in China is Dalian Bay Tunnel. On March 9 second immersive tunnel tube installation begin.
https://news.cgtn.com/news/2021-03-08/Live-Dalian-bay-undersea-tunnel-ready-for-second-tube-installation-Yt9aLegNvW/index.html
Dalian bay undersea tunnel is the first cross-sea tunnel in northern China. On 9th of March, the construction of its second immersive tube is under way.
https://news.cgtn.com/news/2021-03-08/Live-Dalian-bay-undersea-tunnel-ready-for-second-tube-installation-Yt9aLegNvW/index.html
Live: Dalian bay undersea tunnel ready for second tube installation
news.cgtn.comDalian bay undersea tunnel is the first cross-sea tunnel in northern China. On 9th of March, the construction of its second immersive tube is under way.