Population base around farmers' market. Through software big data, the population and population nature around 1-2 km were investigated, especially the age structure of middle-aged and elderly people and the proportion of middle-and high-income people.

2. The proportion of old and new communities around the farmers' market. How many new development zones are there, what is the occupancy rate, the household structure, the proportion of tenants and the proportion of middle-aged and elderly people in the old areas.

3. Investigation on the surrounding formats of farmers' markets. Whether the proportion of fresh food, supermarkets, fruit and vegetable shops and other areas near the location is saturated and reasonable.