不要随地吐痰
Don't spit on the floor
不要随地吐痰或乱抛垃圾
Do not spit or litter.
不要乱扔垃圾
Don't litter at random
不要在墙上乱涂
Do not scribble on the wall!
坚持每天认真打扫室内外卫生.
Keep clean up Indoor and outdoor seriously everyday