Shan State Special Region 4, commonly known as Mongla area or Lesser Mongla area, is a special region administrated by Peace and Solidarity Committee (PSC) of Shan State-East. It covers territories of the entire Mong La Township, eastern part of Mong Hpayak Township and to the north borders the northern part of Wa State. The indigenous peoples of this region are Blang, Pyin, Akha, Hani, Lahu and Tai Lue people, etc. while the lingua franca is Mandarin Chinese. Sai Leun maintained a good relationship with Burmese army (Tatmadaw) as the Tatmadaw units benefit financially from it.