My System That Covers the Sky Is Unknown

He was in Beidou, just got out of the mines, his surname was Ji, but he was ridiculously poor. My family sold me ten kilograms of energy and sent me to learn the art of energy from my master Wang Fugui. As a result, the old man lay down every day, and I mined every day, and even his dog "Wangcai" lived a more comfortable life than me. "Master, there is a group purchase discount at Zishan Tourist Area. Why don't you go and see the former residence of Emperor Wushi?" "No money." He said concisely. I sighed and jumped back into the mine resignedly. There's nothing I can do about it, the [Unknown] system in my brain hasn't been fed yet today. If I can't find a source of ten kilograms to supply, I may become the first red-haired monster in history to mutate due to loan debt.