Sanya is situated on the southernmost tip of Hainan Province. Giving it the tropical monsoon climate of this region, Sanya has many natural advantages. Possessing a number of excellent harbors, Sanya is an important port for import and export of trade with foreign countries. Therefore, Sanya is also named the ''South Gate of China to stress its importance while it plays a vital role in the life of the southern part of China in areas of the economy and politics to transportation.