I Rely on My Future Self to Save the World

My name is Wu Liang and I am a sorter at Imperial Capital Express. On August 15th, when I was lying down and resting in a rental house, my colleague knocked on my door. "Is Wu Liang at home? You have a one-piece express delivery." "Isn't it possible? I didn't buy anything... How much is the express delivery fee?" "Mr. 50." I opened the door and wanted to ask him if he had sent it to the wrong person, but after I saw his body that looked like an iron tower, I still paid him 50 yuan for the courier fee. When I opened the package, I found inside it an electronic watch and a letter addressed to me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.