Most of the people in XI Base were men. This was a closed-off training base, so no matter what you put in your room, no one would dare to steal it, so almost no door was installed with a lock. It was impossible to lock the door, which facilitated drillmasters to occasionally check the rooms for any prohibited items. After all, the management here was strict and was literally military management.
Besides, there were all men in the base. Even if you took a shower, you didn't have to lock the door. The members were all brothers living or dying together, so there was nothing to hide.
Feng Ling would lock the bathroom door every time before taking a bath. The lock on the bathroom door was a small lock that she secretly bought when she was out on a mission, but she did not lock the door outside.
