


They assisted the Ryukyuans in advancing their technology and diplomatic relations. Many Ryukyuan officials were descended from these Chinese immigrants, being born in China or having Chinese grandfathers. At the request of the Ryukyuan King, the Ming Chinese sent thirty-six Chinese families from Fujian to manage oceanic dealings in the kingdom in 1392, during the Hongwu emperor's reign. Many Chinese people moved to Ryukyu to serve the government or to engage in business during this period.

These sites and Chūzan as a whole would continue to form the center of the Ryukyu Kingdom until its abolition. Its political capital at Shuri, Nanzan was adjacent to the major port of Naha, and Kume-mura, the center of traditional Chinese education. Chūzan lay in the center of the island and was economically the strongest. Nanzan constituted the southern portion of the island. Hokuzan, which constituted much of the northern half of the island, was the largest in terms of land area and military strength but was economically the weakest of the three. This was known as the Three Kingdoms, or Sanzan ( 三山, Three Mountains) period. In the 14th century, small domains scattered on Okinawa Island were unified into three principalities: Hokuzan ( 北山, Northern Mountain), Chūzan ( 中山, Central Mountain), and Nanzan ( 南山, Southern Mountain).
