Definition
This idiom is used to advise someone to have fun and enjoy themselves but also to be cautious and avoid taking unnecessary risks.
尽情盈兴，但请务必小心。
Kids, go have fun, but remember, be good, and if you can't be good, be careful.
孩子们，去玩得开心，但记住，要乖，如果不能乖，就要小心。
I know you're looking forward to the party, have a good time, but remember, be good, and if you can't be good, be careful.
我知道你期待着派对，玩得开心，但记住，要乖，如果不能乖，就要小心。
College life is an amazing experience, enjoy it, but remember, be good, and if you can't be good, be careful.
大学生活是一段美好的经历，好好享受，但记住，要乖，如果不能乖，就要小心。