Sweet bean curd soup. According to historical records, Emperor Kangxi likes to eat light dishes with soft texture and delicious taste. Once I went to the south and stayed at Cao Yin's home, Cao Yin invited Zhang Donggong, the chef of "Deyuelou". Zhang Donggong racked his brains and finally made a delicious dish with tofu and eight ingredients. Finally, the emperor named it "Babel Tofu Soup", and Zhang Donggong was arranged to work in the royal kitchen. From then on, there was Babel Tofu.