It is best to serve cold salad from 9: 00 am to12: 00 am for the following reasons:

1. Breakfast demand: At this time, many people are eating breakfast and getting ready for work, so there is a great demand for breakfast stalls. As a choice of breakfast, cold salad can meet the taste needs of some people.

2. Weather factors: 9: 00 am-12: 00 am, the temperature is relatively high, and people have a great demand for cold food such as cold salad.

3. Lunch preparation: Many people prepare their own lunch in the morning, so eating at this time can make the booth attract more customers with lunch needs.

4. Choice of stall location: If the stall is in a place with a large flow of people, such as business districts, schools, factories and other places, then eating at this time can attract more customers.