Answer: As cute little Bao grew up, he had his own way of thinking and craved for the freedom to do the things he like to do.
Explanation: The mom would always shower little Bao with love. However when he started growing in his teenage years, he began to grow closer to his freinds, drifting away from his mom. So basically he just wanted to be free and his mom worried for him.
Hoped this helped!