C386 We Don't Have Much Time Left

Qin Feng walked over and pointed at the ground. Tang Guozheng said, "I think there's something wrong here."

"Is there a need to say that?" Qin Feng smiled and squatted down. He took out a tin paper from his pocket and wiped the dust off the ground. A ring-shaped piece of metal, about the size of a manhole cover, appeared in front of them and pulled it open