Isn't it just about wanting to know how to make mooncakes?
Even if you watch how the Liang family makes them, Daliang doesn't have red bean paste or lotus seed paste, and can't replicate their bread oven, so how could you steal the technique of making mooncakes?
Do they really think we are country folks who know nothing?
"If anyone of you comes with us, we still won't be able to make as many as fifty letters in one afternoon."
"Thirty letters will do, please help us, our madam really likes them. Moreover, since it's urgent, our madam is willing to pay an extra ten wen per letter." The maid was clearly anxious as she offered a higher price.
Madam Liang was very tempted, that could earn an extra two hundred wen!
But she had given the initiative to Zhang Xiaoying, so it wouldn't be right for her to speak over her and say she could make them!