It has been rumored for a long time that Nightingale Island in Beibu Gulf (Bailongwei Island), which has belonged to China since ancient times, has caused the loss of 20,000 square kilometers of coastal areas. It should be said that compared with those unscrupulous rumors, this joke has a high technical content, because there is indeed a historical fact that China handed over the island to Viet Nam. So this joke is often pulled out as TG treason.

Then, since Bailongwei Island has been the territory of China since ancient times, as early as 1974, the Xisha naval battle recovered Ganquan Island, Coral Island and Treasure Island. Then, from 1979 to the 1980s, the two sides fought, and China recovered the territory of China occupied by the Vietnamese army, but never got its hands on Bai Rowen Island. Why is this?