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Happy Formula (Chinese: 开心方程式) is the tenth season of the Pleasant Goat and Big Big Wolf series. Both the opening and the ending themes are "Don't Think I'm Only a Goat" by Ivy Koo.


The Chinese logo

A mysterious force landed on the Green Green Grassland, and the Goats on the grassland were each gifted a unique vehicle of their own. Not only do their new vehicles can express emotions, they even have their own thoughts: they soon become friends with the Goats. However, the Wolffy is always after the Goats, he also made himself a high-tech vehicle. and thus creates an exciting adventure in the Green Green Grassland.


  • Episode 10 of Happy Formula is the 1,000th overall episode of the Pleasant Goat donghua.