Assignment task:
Story: "Du Shiniang Sinks the Jewel Box in Anger" by: Feng Menglong
Knowing that Li Jia loved Du Mei and wanted to marry her, his friend, the true academic scholar Liu Yuchun, thought that the Madame of the brothel and Du Mei were trying to get rid of the now moneyless Master Li by promising to sell Du Mei for 300 taels of silver instead of the "market price" of at least 1000, if Master Li could raise the money in 10 days.
Indeed, that was the Madame's plan. What did Du Mei do that convinced Liu Yuchun that Du Mei was not like that, but truly loved Li Jia?
When he was convinced of Du Mei's love for Li Jia, what did Liu Yuchun do?