Mile City (Mile County), a county-level city under the jurisdiction of Honghe Hani and Yi Autonomous Prefecture of Yunnan Province, is located in the southeast of Yunnan Province and the north of Honghe Prefecture, and is located between 103 ° 04 ′ - 103 ° 49 ′ E and 23 ° 50 ′ - 24 ° 39 ′ N. As of October 2022, Maitreya City covers an area of 4004 square kilometers and has jurisdiction over 3 streets, 9 towns and 2 townships. The People's Government of Maitreya is located at No. 136, Tongweng West Road, Miyang Town. By the end of 2021, the total registered residence population of Maitreya City will be 553200.

Maitrehan belongs to Zangke County. There are historical records in the sixth year of Yuanding in the Western Han Dynasty (111 BC). It is named after the "Maitreya Department", one of the thirty-seven departments of Dongcuan in Yunnan, which lived here during the Tang and Song Dynasties. In the 27th year of the Yuan to Yuan Dynasty (1290), Mile Prefecture was established. In the 35th year of the Qianlong reign of the Qing Dynasty (1770), Mile County was established. In March 2013, it was withdrawn from the county and established as a city. Maitreya is an important hub for "connecting central Yunnan and Guangdong", and an important node for "going out to the sea and radiating ASEAN". There are 1.9 billion tons of coal reserves in the territory, with a wide variety of fruits, vegetables, medicines and flowers. The planting area of fruits, vegetables, flowers and traditional Chinese medicine is 660000 mu. It is an important source of raw materials for food and medicine in Yunnan. The territory is rich in tourism resources. Four provincial characteristic towns, including Taiping Lake, Dongfengyun, Keyi and Honghe Watertown, have become new windows for tourism in the whole region.

In 2021, the gross regional product of Maitreya will reach 49.61 billion yuan, up 7.6% year on year; The total local fiscal revenue was 2.853 billion yuan, up 1.8% year on year.