Mangdi (Pinyin: máng dí), also known as La Luomu and Lengnong, is a single-reed gas-sounding instrument unique to the Chamang people. It is popular in the area of Nanke Xinzhai, Mengla District, Jinping County, Honghe Hani and Yi Autonomous Prefecture, Yunnan Province.

The man flute consists of three parts: the reed pipe, the main pipe and the resonator. The tube body is made of bamboo, mostly made of mangosteen grown on the local high mountains. The reed pipe is a thin bamboo tube with a bamboo joint at the head, 10 cm long and an open end. The front tube body is thinned and flattened, and a sharp knife is used to carve a piece below 1.5 cm from the bamboo joint. A rectangular bamboo reed, the tail end of the tube is inserted into the mouth of the head end of the main tube. The main tube is a long bamboo tube with a length of 140 cm. There are three or four circular sound holes in the lower part of the tube body. The resonance tube is a large bamboo tube with a height of 20 cm to 30 cm and an inner diameter of 6 cm to 8 cm.

Mandi has a rough pronunciation and a rich tone. It is mostly used for solo or to accompany folk songs, and it is an inseparable musical instrument for young men and women to socialize and fall in love. There are "playing tune" and so on.