First, wash the chicken side legs, add salt and cooking wine, stir and marinate evenly for 30 minutes, put them in boiling water, take them out and pour them into a hot pot for later use, add onion, ginger and garlic into a wok, add thirteen spices, sugar and salt, stir-fry them evenly with soy sauce, put them into the prepared chicken side legs, fry them on both sides for the first time, pour in half a pot of water, cover the pot, simmer until the chicken legs are cooked and tasty, and fire. Pour oil into the hot pot, add onion, ginger and garlic, add thirteen spices, sugar and salt, stir well with soy sauce, add the prepared chicken legs, fry them on both sides until the color is higher, pour in half a pot of water, cover the lid and simmer slowly until the chicken legs are cooked and tasty, and the delicious chicken legs are out of the pot!