Even though Chun was inexperienced in this area, he knew nitroglycerin must be protected from light, moisture, heat, and shock. So the storage location certainly couldn't be near windows, sinks, or machines…
Chun arrived at a cabinet that met the conditions, but it was locked.
This? Where's the key?
The problem is, searching for the key now is like looking for a needle in a haystack; maybe the key was taken home by the custodian after work and isn't even in the factory.
Then forcibly break open the cabinet? Chun was quite confident in his soul power, and finding some tools nearby to forcibly pry open the cabinet wasn't an issue, but who knows, the moment the cabinet is opened, the bottles might break and explode.
Wait!
There's another possibility that the cabinet's contents are unstable, pressed against the door! Even with a key, the moment the door is opened, it'll fall—a trap.
