What does it mean that youth flies freely and love lasts forever? In fact, this sentence means: youth flies freely, love lasts forever, and "lasts" from the still water. "Sustainability" is a cartoon produced by Haoshen culture and adapted from a novel of the same name by the well. Mainly tells the story that the warm and poor ballet boy X is a passionate and brave boxing boy. They met in the Children's Palace and grew up together to support each other. Even in the face of difficulties and doubts, they are determined to move forward towards their dreams. The beauty of youth lies in the sweat after hard work and the watering of friendship. Although the life of teenagers is different, what remains unchanged is warm friendship.