This key, according to Mr. Zhuo Yihang, was taken from Cheng Weiwei.

The key is inserted into the keyhole, clicked and unlocked.

Liang Chuan took a deep breath and twisted the door handle, pushed the door into the room. It was dark in the bedroom. Liang Chuan didn't turn on the light. He put on his prepared infrared glasses to help him see the indoor scene.

Go to Cheng Fanfang's bedside cabinet and find the bottle with the same appearance as the maintenance product in hand. Liang Chuan replaced the real maintenance product of Cheng Fanfang's bedside cabinet with the fake maintenance product in hand.

After doing this, Liang Chuan...