Hawaii is the only archipelago state in the United States, consisting of 132 islands in the central Pacific Ocean. The land area is 1.67 million square kilometers. Hawaii is an island-type climate, with monsoon adjustment throughout the year, and the annual temperature is about 26 ℃-31 ℃. It is located at the crossroads of the Pacific Ocean and is a sea and air transportation hub between Asia, the United States and Oceania. Honolulu is a relay line and an important port for the Pacific route.