For the older generations, wet markets represent a traditional reminder of their country's and personal history. When supermarkets emerged in 1991 many wet markets were closed down. This change took place quickly and rapidly because of government policies regarding health and sanitary conditions, improved economic conditions, and changes of people's consumption concept and formation. The supermarkets in Shanghai are organized similarly to Canadian supermarkets, with important differences in products on the shelves. Most supermarkets also sell detergents, toothpaste, household, electrical and entertainment products.
Shanghai has a varied climate with cold, damp winters and tropical, humid summer.
Product sales and stocks respond accordingly. Some supermarkets offer live seafood, an instore bakery and newspapers. Microwaveable Chinese dishes are also increasing in popularity. There are several ways that Canadian products enter Shanghai's supermarkets. The following is a generalized structure.