The couple's lung slices were named Mr. and Mrs. Smith because of the "American 20 17 Food Ranking" published by Martin in 20 17, and the signature cold dish "Couple's lung slices" of a Sichuan restaurant in Houston topped the list and was selected as the "appetizer of the year". But the English name of Daocai was translated into "Mr. and Mrs. Smith".

Husband and wife lung slices are a traditional famous dish in Chengdu, Sichuan Province, which belongs to Sichuan cuisine. This dish was created by Guo Chaohua and Zhang Tianzheng. Usually, beef scalp, beef heart, beef tongue, beef tripe and beef are the main ingredients, marinated and then sliced. Add Chili oil, pepper noodles and other auxiliary materials to make red oil and pour it on it. It is fine in production, beautiful in color, tender and delicious, spicy and fragrant, and very palatable.