Hainan 30km mainland. Tunnel must 30 kilometre long. Idea plans.
https://www.scmp.com/news/china/politics/article/3117960/south-china-sea-strategic-benefit-if-beijing-builds-tunnel
Revived idea can boost economy and cut journeys to the island to 10 minutes by rail, it is claimed, after past plans to connect the free-trade hub hit problems.
https://www.scmp.com/news/china/politics/article/3117960/south-china-sea-strategic-benefit-if-beijing-builds-tunnel
‘South China Sea strategic benefit’ if Beijing builds a tunnel to Hainan
www.scmp.comRevived idea can boost economy and cut journeys to the island to 10 minutes by rail, it is claimed, after past plans to connect the free-trade hub hit problems.