Meitounao He Bugaoxing
Type: Movie, Episodes: 1
Aired: 1962
Studio: Shanghai Animation Film Studio
Source: Original
Rating: PG - Children
Synopsis:
No-brain is a forgetful boy and Unhappiness is unhappy for everything. When others worry about their future, they really become grownups at once to make careers as they wish. But they make a series of troubles. 

(Source: IMDb)