Thuwunna National Indoor Stadium (1)
National Indoor Stadium (1), Thuwunna is an indoor stadium located in Yangon, Myanmar. It is the largest indoor sports stadium in Myanmar, with a capacity of 10,825 people and located near Thuwunna Stadium. History 
The Thuwanna National Indoor Stadium was built by China in 1983. Completed in 1986, it became the country's first modern indoor stadium. Later, with the support of the United States, No (2) National Indoor Stadium was opened at Yangon University - Hlaing Campus, but not as big as No. (1). During the 2013 Southeast Asian Games, modern sports facilities such as the Wunna Theikdi Indoor Stadium in Zambu Thiri Sports Complex and Zeyar Thiri Indoor Stadium in the military-owned Zeyar Thiri Sports Complex emerged in Naypyidaw. However, unlike the Thuwanna Indoor Stadium, these stadiums are a combination of the 3,000-seat A and C Stadiums and the 5,000-seat B Stadium. Since August 2019, China has been repairing and renovating the dilapidated stadium. The stadium held many Lethwei events
and mixed martial arts events by ONE Championship. References 

Multi-purpose stadiums in Myanmar
Buildings and structures in Yangon
Sports venues completed in 1986
Sport in Yangon
1986 establishments in Burma
Lethwei venues in Myanmar