The difference between a semi-buffet and a full buffet is the difference in price and portion size.

Semi-buffet: The buffet fee you pay can only eat part of the food, the other part of the food is charged separately.

All-you-can-eat buffet: The buffet fee you pay can enjoy all the food in the automatic area. You don't have to pay for it.

Expanded Information:

Buffet, which is currently the international popularity of a kind of informal Western-style banquets, especially in large-scale business activities. Its specific practice is not to prepare a meal, but by the diner freely in the meal time to choose their own food, drink, and then or stand or sit, free to eat with others in the together or alone.

The reason why buffet is called buffet is mainly because it can mobilize the diner's initiative during the meal, and by their own hands, their own help themselves, their own in the established range of arrangements for the selection of dishes. As for the fact that it is also called a cold dinner party, it is mainly because the food provided is mainly cold. Of course, some hot dishes are provided in moderation, or some semi-finished products are provided to be processed by the diners themselves.

Baidu Encyclopedia - Buffet