The theme song of "Happy Cool 2".

According to the query of Kuwo Music, the lyrics of "What kind of song are you happy and I'm not happy?" come from Happy Kubao (theme song of the cartoon "Happy Kubao 2"), sung and written by singer Chen Jieli : Sui Xiaofeng Composer: Sui Xiaofeng, released on January 1, 2013.

Lyrics: You are happy, I am not happy. Some people are happy and some are crying. How can we persevere to the end and make the world more beautiful? You collect, I collect too. The whole world is a new sample, so powerful and mysterious, hidden in the heart of mankind. No matter it’s windy or raining, you will never leave me along the way.