1, good manufacturing foundation. Modern Shanghai, as one of the most developed cities in China, brought advanced manufacturing technology and equipment due to a large number of foreigners' occupation, so flour production could be mass-produced in the form of setting up factories, which laid a solid foundation for the development of flour manufacturing.

2. Convenient transportation. As one of the modern trading ports in China, Shanghai has very convenient and developed transportation, and is close to the origin of wheat. Wheat from Anhui and Suzhou can be processed in Shanghai quickly and then exported to make money, so the flour industry is very developed.