It means that in this chaotic real world, you must stick to your original intention and bottom line, and do not be disturbed by the chaotic outside world. Huahua World is a Chinese idiom, which means a prosperous place where people can eat, drink and have fun. It also refers to the human world in general. Keeping one's heart quietly means sticking to one's own heart and maintaining inner peace and firmness. The phrase "Flower World, Quietly Keep Your Heart" expresses a kind of self-examination and advice. It is an attitude of how people maintain their principles and original intentions when facing various temptations and disturbances.