May include the Xisha diving underwater transmission, Li visited the village Wuzhishan transmission, including transmission of the Tropic of Cancer, even transfer across the Qiongzhou Strait.

• 可能包括西沙潜水水下传递、探访五指山黎族村寨传递、北回归线传递等方式，甚至考虑横渡琼州海峡传递。