Shanghai-style sweet and sour chicken is a popular dish that combines the flavors of sweet and tangy sauce with crispy chicken. The chicken is coated in a batter made with cornstarch and egg, then deep-fried until golden and crispy. It is then tossed in a sauce made with vinegar, sugar, ketchup, and soy sauce. The result is a delicious combination of flavors and textures that will satisfy your cravings.