The green sauce of McDonald's is sweet and sour sauce.

McDonald's is a large multinational chain restaurant in the world. It was founded in Chicago, USA in 1955 and has about 31,111 branches in the world. Mainly selling hamburgers, as well as French fries, fried chicken, soft drinks, ice products, salads, fruits and other fast food. McDonald's restaurant was translated into McDonald's fast food in Chinese mainland in the early days, and it was not until the later period that the current Hong Kong-style translation was adopted.

In the folk, because McDonald's and "Peony House" are similar in sound, Peony House is also regarded as a nickname of McDonald's, but it is not common. The most famous McDonald's brand owned by McDonald's Company has more than 32,111 fast-food restaurants in 121 countries and regions around the world. McDonald's around the world make appropriate adjustments to meals according to local tastes. McDonald's also controls some other catering brands.

McDonald's sauces include: tomato sauce, sweet and sour sauce, garlic Chili sauce, before which there were Japanese mustard sauce, Chinese sesame sauce, Italian sweet eggplant sauce and Thai pepper sauce. Kitchen uses: chicken sauce, fish sauce, Big Mac sauce, plate roast sauce, spicy plate roast sauce, curry plate roast sauce and medium sauce. McDonald's is a large multinational chain restaurant in the world, founded in Chicago, USA in 1955.