When Li Changqing was feeling curious, a mysterious voice suddenly emerged from the blood mist.

"Welcome to the Blood Mist Trade Fair. Let me explain the rules."

"When a door appears in front of you, you can enter and present your treasure, as well as the item you wish to trade for."

"Anyone interested in trading can also enter through the door. Each door opens for one person only. If the trade fails, the door will reappear. If the trade succeeds, the next person's trade will commence. The entire process is confidential, so please rest assured."