System: the Richest Man in the Tang Dynasty Started by Setting up a Stall

What? The one who works the watch doesn't even know about the flashlight? Visiting relatives, you don't even know about bicycles? Wouldn't it taste like falling in love if you didn't buy some potato chips? As a migrant worker, Zhang Dong woke up and found that he had brought a shopping mall system to the Tang Dynasty. It can be as small as a towel, flashlight, keychain, or as large as an airplane, cannon, and rocket launcher. Let's see how Zhang Dong started by setting up a stall and brought the Tang Dynasty to the top step by step! ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.