Climate

China is characterized by a continental climate. The latitudes span nearly 50 degrees, its southern part is in the tropical and subtropical zones, and its northern part near the frigid zones. The northern part of Heilongjiang province has long winters but no summers; while Hainan Island has long summers but no winters. The Huaihe River valley is marked by distinctive seasonal changes, but it is spring all year round in the south of the Yunnan-Guizhou Plateau. China's high tundra zone is situated in Qinghai-Tibet, where the temperature is low in all four seasons.