Hai Shi learns more about perfumes from You Du, who is a good friend of Zhou Ying and happens to look very similar to Fang Zhu. You Du had previously seen Hai Shi when she was dressed as a woman, so knows she is masquerading as a man. Zhou Ying was shocked to hear Hai Shi express her feelings for Fang Zhu. Zhe Liu becomes suspicious of Lin Lang and has her maid secretly make peony perfume, in contrast to the lotus perfume that Lin Lang wears. (Source: frankly at MyDramaList)