Exchange system

At night, Li Shimin looked up to the sky and sighed: "Hey! Now that money and food are so scarce, what should I do?"
Suddenly, a voice sounded in Li Shimin's ear: "Lack of money and food? Simple, give me the mural in your house!"
In the antique market, an archaeologist: "Oh my God, this is an authentic Tang Dynasty item. Oh my god..."
"The system prompts, congratulations, you have completed the first-level task. Do you choose to upgrade now?"
"Congratulations, you are one step closer to Superman without underwear, please work hard!"
Ning Cheng: Superman without underwear...

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