This sentence came from the famous Tang Dynasty poet Zhou Yu and Xiao Qiao. The two main characters involved were Zhou Yu and Xiao Qiao. Zhou Yu was a famous general and strategist of the Eastern Wu during the Three Kingdoms period, while Xiao Qiao was a beautiful woman of the Eastern Wu during the Three Kingdoms period. This sentence meant that if the east wind didn't go along with Zhou Yu's plan, then the bronze sparrow in spring would lock Xiao Qiao tightly. This sentence expressed the love story between Zhou Yu and Xiao Qiao in a humorous way and became a classic line in literature and film and television works.