Why are there so many kinds of trays on the plane?

Different flights and different cabins have different types of meals and different service requirements.

1. Different flights have different types of meals: different flights have different types of meals and food forms, so different types of trays need to be used. For example, different types of meals such as breakfast, lunch, dinner and snacks need different types of trays.

2. Different cabins have different service requirements: passengers in different cabins enjoy different service standards. For example, passengers in first class and economy class enjoy different types and quality of services, so different types of pallets are needed to meet different service needs.