灰太狼喜羊羊
[huī tài láng xĭ yáng yáng]
A reference to 'Wolf-Hui and Happy Sheep,' characters from a famous Chinese cartoon series. Wolf-Hui (a persistent wolf) tries tirelessly to catch Happy Sheep, while Happy Sheep always cleverly escapes. This could symbolize playful opposition or endless chasing after something elusive yet enjoyable.