Zi Collection, Upper Volume Radical: Grass (cǎo) Page 468, Entry 05 According to the "Guangyun" (Guangyun), pronounced fu (falling tone) and yi (entering tone), the sound is the same as "fei". It is a type of grass. Wu Collection, Upper Volume Radical: Grass (cǎo) Page 770, Entry 03 Also recorded in "Fangyan" (Yangzi Fangyan), in the Jiang and Xiang regions, any sudden encounter is called "fu".