His departure from the Cyan Yuan Sect was also a perfect opportunity to test Han Bingyu.
He would seal the secret chamber before leaving and place some measures inside to investigate.
The same would apply to his bedroom. He wouldn't remove the Hidden Weapons; instead, he'd leave behind some items for detection, just to see if Han Bingyu would make any moves.
The human heart is not something to be tested, but he had high hopes for Han Bingyu, so a test was necessary to see if she was worth cultivating.
For instance, by leaving the Cyan Yuan Sect, he was giving Han Bingyu the chance to come to his residence. Basically, no one would bother her. If she was curious about the things in Yang Chan's bedroom, or even wanted to uncover some of his secrets, she would almost certainly enter the room to investigate.
