What tools did Shanghai refer to in ancient times?

(1)[ Bamboo fish trap]

Shanghai tide fish is short, but the wind blows the boat sideways. -Lu You's "Shanzhai"

Bamboo is in the sea, say to Shanghai. -Preface to Tang Lu Guimeng's Fishing Gear

② Short name of [Shanghai]. Such as: Hujiang; Shanghai opera

In ancient times, fishermen in Shanghai invented a bamboo fishing tool "Hu". At that time, there was no place name of Shanghai, so this area was called "Hudu", so Shanghai was called "Shanghai" for short. During the Spring and Autumn Period and the Warring States Period, Shanghai was a part of the feudal city of Huang Xie, so it was nicknamed "Shen".