Called the first city in the limit by Xu Xiake.

Xu Xiake, a famous geographer in Ming Dynasty, came to Tengchong, Yunnan more than 300 years ago, and said that "Tengyue is the south gate of the city, that is, when the street is north, the south of the city is very prosperous, but there is nothing in the city and nothing in the west", exclaiming that this border city is "the first city in the extreme".

Tengchong City is a county-level city under the jurisdiction of Yunnan Province, managed by Baoshan City and located in the southwest of Yunnan Province. Located in the west of Baoshan City, it borders Longyang District in the east, Longling County and lianghe county in the south, Yingjiang County and Myanmar Union in the west, and Lushui City in Nujiang Lisu Autonomous Prefecture in the northeast. The urban area is 606 kilometers away from Kunming, the provincial capital, 200 kilometers away from Myitkyina, Myanmar and 602 kilometers away from Redo, India. It is an important gateway and node for China to South Asia and Southeast Asia. The total area is 5845 square kilometers, and the border line is 148.075 kilometers long. By the end of 2022, it had jurisdiction over 10 towns, 7 townships and 2 streets. The municipal government is stationed in Tengyue Street. At the end of 20021,the resident population was 643,000.

Tengchong is a famous historical and cultural city at the provincial level in Yunnan, and it is also a famous hometown of overseas Chinese, a hometown of literature and a jade distribution center. Tengchong was called Dianyue in the Western Han Dynasty, and Tengchong Prefecture was established in central Dali. Due to the important geographical position, all previous dynasties sent heavy troops to station, and in the Ming Dynasty, a stone city was built, which was called "the first city at the extreme edge". There are many tourist attractions, such as hawaii volcanoes national park, Heshun Ancient Town, beihai wetland and National Memorial Cemetery.