Dinghei (pinyin: dīng hēi) is a musical instrument with bows and strings. It is called Dong Zongqin because the strings use Dong Zong silk. Also known as Ding, Duxingqin, it is the only stringed instrument of the Kemu people. Popular in Mengla, Jinghong and other places in Xishuangbanna Dai Autonomous Prefecture, Yunnan Province.

The shape is ancient, and the shape is similar to the erhu. The exterior of the back half of the qin barrel is often engraved with exquisite patterns. There is also a qin tube made of a bamboo tube with bamboo joints or the upper section of a gourd. The rear end of the tube is closed, and there are several circular sound holes on the wall of the tube. A bamboo or charcoal bridge is placed on the panel, and a strand of dong brown silk is used as the strings. The qin bow is made of bamboo strips, and the two ends are made of thin bamboo filaments split from thin bamboo skins as bow hairs. The length of the bow is 60 cm.

Ding Hei is mostly used for solo. On festivals, festive occasions or ordinary nights, the Kemu people often play Ding Hei and play ancient folk songs to recall those unforgettable historical years. The young man Kemu especially likes the single-stringed ding. Whenever he goes on a date with a girl at night, it is a must-have musical instrument. He often plays the ding-hei by the side of the village to welcome the arrival of his sweetheart.

Famous pieces include "Chunan Girl Tune", "Suffering Tune", "Sad Tune" and so on.