Let's get this straight: water flows east, how to steal time. It should be Li Yu's: it's just a river flowing eastward.
In How to Steal Time, the word "stealing" reminds people of Li Qingzhao's "people are thinner than yellow flowers".
The first sentence of the chorus "Who is playing the direct answer with the pipa" is to play a tune named "Dongfeng" with the pipa. "Pipa Music" by Yuan Zhen in Tang Dynasty: "The moon is bright and cold, and suddenly the music is broken. A million golden bells turn to a jade plate, and the drunken passengers are full of ships. " It is to describe the situation that the music rhythm is getting faster and faster after the pipa plays to the breaking point. The above is for reference.