He knew that back in the day, Chen Huihong was known as the crazy lady. In Beiping City, there was a Taifeng Building, whose main chef at the time was Jiang Chengde. Master Jing happened to be Jiang Chengde's son, Jiang Weijin. So, through these connections, he could link the roasted pork and mixed fruit filling glutinous rice ball and speculate on the idea of using so many ingredients for the mixed fruit filling glutinous rice ball.
But Qin Huai couldn't tell Zheng Siyuan this way.
He needed to come up with a reasonable explanation that a normal person could accept.
If this reason was based on his successful creation of the mixed fruit filling, then even if the reason wasn't that rational, a normal person could still accept it.
Ouyang went to buy winter melon candy for Qin Huai, so when Qin Huai took an afternoon break, instead of making Four Happiness glutinous rice, he practiced by making Hedgehog Buns.
Hedgehog Buns were at least a bit more difficult than Rabbit Buns.