I. Zhao Keming as Old Boy

Synopsis: Grandpa Old Boy is the leader of the Happy Planet, a great inventor, who likes to help children on Earth find happiness, and enjoys all kinds of scientific experiments, and he's a happy little old man who is the embodiment of wisdom and humor.

Two, Zhang Zhaoyi as Ice Lemon

Introduction: Ice Lemon is a small inventor of the Happy Planet, likes to help the children of the Earth to find happiness, she is a quiet, beautiful, lovely, kind girl, and a love of tears of the good girl, environmental protection awareness is particularly strong.

Three: Sun Ge as Lian Rongbao

Introduction: Lian Rongbao is a small inventor of the Happy Planet, naughty, active, but more adventurous, she has a bold, active character, likes to help the children on Earth, is a full of "tomboy".

Four, Xing Kaixuan as Polyhedron

Introduction: Polyhedron is a small inventor of the Happy Planet, he is a superhuman intelligence, likes to research and invent all kinds of strange and weird things, he is a little proud of the child occasionally.

Fifth, Li Rui as Ding Kailuo

Synopsis: Ding Kailuo is a fourth-grade student in a real-life elementary school, and like most 10-year-olds in China, he lives a quiet, ordinary and routine life. But his personality is very introverted and timid.

Baidu Encyclopedia - Happy Planet 1