混小子以后别抽烟了坏女孩以后别喝酒了
[hùn xiăo zi yĭ hòu bié chōu yān le huài nǚ hái yĭ hòu bié hē jiŭ le]
It means 'Naughty Boy, Don't Smoke Anymore; Naughty Girl, Don't Drink Anymore'. This could imply concern for youth who have unhealthy habits, showing care and expectation for improvement.