Caution: Slippery (Wet Floor)!
Silence/Keep Quiet(in Library), blablabla...
Voice Down!
Danger! Keep Away!
No Smoking
Do not rush in corridors, blablabla...
Authorized Personels Only
Do not cross the line
Under construction
CCTV（安银判保摄像头锋拆改）御烂 on Line. (Just heard somebody got beaten up in a HK university, but is this really necceasary?)
Do not litter
找百度
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