When the typhoon days arrive, the doors inside the house will be blown away by the wind. 

Why was the door that was thought to be so easy to be blown away by the wind?

 It turns out that the two marbles inside the door lock are severely worn, causing the lock tongue to be easily slipped by external force. 

At the suggestion of the door lock master, I purchased a new door lock from Degol Hardware.

 Master recommends: the door lock should choose copper or stainless steel door locks, not to be cheap, to avoid adverse consequences after use!