The reason why Chen Tian could see that there was a secret door there actually came from a special course he had studied when he was in the Raptors squadron, and the name of that course is still fresh in Chen Tian's memory, called "Special Architecture". This course is based on the fundamentals of architecture, and the content is all about how to find a room in a short period of time, where there is a secret door, where there is a guarantee...

"The Dragon Descends the Mountain" Chapter 185: Successful is in the middle of the hand, please wait a while,

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