Kung Fu Panda 4 reveals the reason why Father Goose has been single. It turns out that Father Goose's girlfriend is the sister of a bad peacock. Two birds really love each other, but they are cruelly separated by a bad peacock. At this time, Wulin is killing each other for a secret of Wulin, and the panda shoulders the heavy responsibility of maintaining peace in Wulin. A female panda appeared, fighting between Po and the tigress. The result of this Wulin secret book was just a recipe, and Po didn't realize it until Father Goose was cooking.