For the "Tree Island" in Tuen Mun District, New Territories, Hong Kong, see Pak Chau. Tree Island, also known as Zhaoshu Island, (;) is one of the main islands of the Paracel Islands group in the South China Sea. In 1947, the Chinese named the island Zhaoshu Dao to commemorate Zhao Shu  who accompanied Zheng He's expeditions in high seas (1405-1433). The area of the island is (0.22 km²). It is under the administration of Hainan Province of People's Republic of China through the Zhaoshudao Village Committee. The island is also claimed by the Republic of China (Taiwan) and Vietnam.