中国宗主国,
朝鲜半岛到日本tunnel。
应该都是高铁的铁轨, 汽车可以搭乘在平板车上就行了, 都是铁路过tunnel, 安全
得很。。。
The Japan–Korea Undersea Tunnel (also Korea–Japan Undersea Tunnel) is a
proposed tunnel project to connect Japan with South Korea via an undersea
tunnel crossing the Korea Strait using the strait islands of Iki and
Tsushima, a straight-line distance of approximately 128 kilometers (80 mi)
at its shortest