陰陽先生 (Yīnyáng Xiānshēng)

Background
"Yīnyáng Xiānshēng" is the fourth song of the Didn't Eat Medicine Yet series and features Tianyi and YANHE. The song is about the master of Fengshui (Yin and Yang) giving a girl some medicine to avoid the Night Crawler.

This song has exceeded 100,000 views on bilibili.