Maru, also known as Lhao Vo and Langsu (Chinese: 浪速), is a Burmish language of Burma with a few thousand speakers in China.
Dai Qingxia (2005:3) reports 5,600 Langsu speakers in China. Many thousands more are dispersed across the eastern edge of Kachin State, Burma.
The Langsong 浪宋 are found in Zaoyang 早阳 in Yunlong County, as well as in Baocun 表村, Laomo 老末, and Sancha 三岔. They reportedly speak a highly endangered language that may be possibly related to Langsu.