Originally, Yun Chu couldn't tell what Tan Shi was up to, but she reacted quickly and soon figured out what Tan Shi was doing.
Clearly, he was opening the safe.
The location of the safe was in the wall, where that oil painting was; it should be the switch for the safe.
Tan Shi opened the safe in front of her with ease and openness, without any intention of hiding it.
However, Yun Chu felt embarrassed to just watch.
How to put it, a safe, especially the Tan Residence's safe, it's not just the password that's secret; the location and method of opening it should be secret too. These are all parts of a safe.
Tan Shi, in front of her, exposed the location of the safe without reservation, which was quite... out of line.
If Yun Chu continued watching Tan Shi unlock layer after layer of restrictions until he ultimately opened the safe, it would be very inappropriate.
