I Opened the Lock. the Back Is Not a Room.

Fang Younian, a locksmith in the old alley, abides by a rule left by his grandfather - before opening the lock, ask if there is anything alive inside. In thirty-four years, no one has answered "yes". Until late that night, Sun Mao, a regular customer, paused on the phone for three seconds and said, no. He opened the lock. There is no room behind the door. The line of words that popped up from the system pinned him to the spot and did not move for a long time. Grandpa's words turned out to mean this - there are some locks in this city that are not locked by humans. Every time he opened a lock, something opened somewhere else. The translation only gives one line of words and no reason. When File Team Three came to the door, they only said one sentence: Your grandfather's name is on the third page of this booklet. From that day on, he became a key protection target. Some people also put him on the priority list