Government archives and historical materials show that Japan admitted both publicly and in government documents in the 1920s and 1930s that the Xisha Islands in the South China Sea belong to China, said Zhu Jianrong, a professor of international relations at Toyo Gakuen University in Tokyo, Japan.
Sansha City, China's youngest city in Hainan Province, started to build its first school on Saturday.
China is scheduled to let tourists visit the Xisha Islands in the South China Sea ahead of the forthcoming May Day holiday, said Tan Li, executive vice governor of the southern-most province of Hainan, on Saturday.