accident
airport
attention
beware
building
cantonese
careful
caution
china
chinese
clean
danger
fall
floor
hazard
hazardous
hurt
indoors
information
injury
interior
irony
janitor
joke
liability
lobby
maintenance
mistake
mopped
mopping
notice
peril
precaution
prevent
prevention
progress
public
reflection
risk
safety
sign
signal
skid
slip
stairs
symbol
tiles
warning
wet
yellow