What is the allusion to Tongquechun locking up Erqiao?

If Dongfeng does not make things convenient for Zhou Yu, then Tongquechun will lock Erqiao deep inside Locked inside.

[Appreciation] This is an epic poem. In the thirteenth year of Jian'an (208), Cao Cao launched a large-scale conquest of Wu. Zhou Yu burned Cao Cao's warships in Chibi with a fire attack. When the southeast wind blew up, Cao Cao's army was defeated. Tongque, the name of the Taiwanese temple, was built by Cao Cao in Linzhang County, Hebei Province today. Erqiao refers to Sun Ce's wife Da Qiao and Zhou Yu's wife Xiao Qiao. The last two lines of the poem are said to be exquisite. It means that the victory at Chibi was all a fluke; if there was no east wind at this time and the fire attack failed, Wu would fall and Er Qiao would be taken captive to Wei. Although the poet uses discussion as a poem, through the vivid language of two people locked on the bronze bird platform, "you can feel the elegance and beauty, which increases people's feelings." Therefore, He Yisun's "Poetry Raft" said: "This righteous man is clever in his position." .

〔Original work〕The broken halberd has fallen into the sand and the iron has not disappeared, but it will be washed away and we will recognize the past. Dongfeng doesn't want to be with Zhou Lang, and Tongquechun locks Erqiao deeply.