Chen Ping stroked the groove. "But what's needed to open it""Mr. Chen, it looks like this smooth door suddenly has a groove. It must be some kind of hidden lock mechanism. There should be a key with t... come by. Sometimes it's simply impossible to attain."And there are many theories about what each person's body is suited to sense at its core.Gao Qiqiang said!"Let me try to contemplate, maybe I can...