Well, it was written in Tian Zige.

【pi】?

hey

(Chinese character strokes)

両: Pi ㄆㄧㄝˇ. Shuo Wen Jie Zi: "Yi Ye. Like the shape of a left guide. " . Right-handed people are also like the left-handed paradigm.

Original meaning: the ancient word "Pi", one of the main strokes of Chinese characters, inclines from upper right to lower left. (The antonym of "hey". )