C420 (1)

He closed the door to the nursery. After he left, Xia Xingxuan went to open the door but found that the door was locked.

He was afraid that she would run away, so he locked the door?

If there was no key to open the door, then the door could not be opened.

Fu Jinchen did not want her to be alone. He was imprisoning her, treating her like an annoying person and locking her up