Puer has a long history before 109 BC, which is located in the southwest of Yunnan Province. It is adjacent to Honghe and Yuxi in the east, Xishuangbanna in the south, Dali and Chuxiong in the north. It is bordered by Vietnam and Laos in the southeast and Myanmar in the southwest. Puer City was once an important station on the Ancient Tea-Horse Road. Due to the subtropical monsoon climate, most of the area is frost-free throughout the year. It is one of the important producing areas of the famous Puer Tea and one of the largest tea-producing areas in China.