The pair of butterflies dancing, love is not extinct from which folk tale

Liang Zhu, the first reaction to the mention of butterflies is this.

Ju Yingtai went to the Nishan Academy in disguise to study, and met Liang Shanbo, a kind and helpful man, and they sympathized with each other. In the Nishan Academy, Ma Wencai is ruthless, Lu Bingzhang is cynical, and Lou Jingwen is always laughing at Yingtai because she is effeminate. All the daily meals, drinking, sleeping and even bathing are all done together by the group, and Yingtai, who is originally a daughter, makes a lot of jokes as a result. In order not to be recognized, Yingtai spits with the boys, speaks foul language, fights, kicks a soccer ball, and acts more like a man than a man. A series of hilarious stories unfolds. From wikipedia