Find a System to Teach Him How to Enter the Mortal World

Zhang Qing, an old man who had lived in seclusion for who knows how many years, went out to buy groceries and bumped into another old man. He opened his mouth to blackmail him and wanted to give him an immortal dynasty. Zhang Qing didn't want to do it either. What should I do? I don't know what to do, so it suddenly flew up, and when I reached out my hand, I caught a system that was floating around. It seemed a little dazed? Don't affect it, just start making it what you want???? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.