Open onion noodles is a famous traditional snack in Shanghai. It is also one of the famous snacks of the Chenghuang Temple. At the end of the Qing Dynasty, it was first created by Chen Youzhi, a pastry chef at Shanghai Chenghuang Temple. This snack is made with open noodles (ie larger shrimp) and scallion with seasoning. The scallions are delicious and delicious. It is very popular with diners. Known as the "scallion and fragrant floating nine-curve bridge", it is characterized by opening onion oil, mixed with noodles, and the mouth is smooth, fresh and fragrant. It is a deep red and yellow onion oil from the hometown of Subei, and it is specially made to open the ocean. It is an appetizing and delicious food. It is a snack for all seasons.

The method of opening the onion oil surface is very particular. It first cuts the onion white into an inch section and fry it in a warm oil pan. (The color of the onion oil prepared by this method is dark red with yellow, green onion and can be smelled. Increase appetite). Then add the onion oil to the open sea that has been fried with vegetarian oil and soaked in wine. Cook the noodles, drain the broth, and mix with the onion oil to make the onion noodles. The color of this noodle is bright, the food is smooth and refreshing, the shrimp is delicious, the onion is fragrant, and the nutrition is rich, which is very popular.