Located on the China-India border, Yumai Township was once known as China's least populated township. For a long period since the 1960s, it was inhabited by only one household consisting of Yangzom, Zhoigar and their father Sangye Quba, who passed away in 2001. Before Sangye Quba's death, he expressed his belief that the authority would develop Yumai well.

Nowadays, Sangye Quba's wish has been fulfilled. In February 2018, Tibet implemented the rural revitalization strategy, combining poverty alleviation and border defense with emphasis on key areas such as water and electricity supply, road construction, information networks, education, culture, health, and social security, striving to improve infrastructure and public services so as to accelerate the development of border areas.

Since 2018, Yumai Township has embarked on the construction of a prosperous border village with steel-framed houses, drainage, schools, and central parks popping up one after another. In 2019, a state investment of over 500 million yuan (about 69.8 million U.S. dollars) completed the reconstruction of the 50-kilometer paved road connecting Yumai to a neighboring township, which ended its pain of being snowbound every year. Additionally, the State Grid extended a 10-kilovolt power transmission line to Yumai, providing stable and secure electricity.

In 2022, the per capita annual income in Yumai reached nearly 44,000 yuan (about 6142.8 U.S. dollars) with a per capita residential area of 40 square meters. The once three-person township has transformed into a "well-off " one with two administrative villages under its jurisdiction.