What does it mean to buckle the hip flask on the plate?

Fasten a hip flask on the plate to show the feast. In China culture, a hip flask on a plate usually means entertaining guests. This practice originated from ancient banquet etiquette. When the host invites guests, he will put an empty hip flask on the banquet and put it upside down on the plate to show that he is welcome. If the distinguished guests accept the invitation, they will buckle the hip flask to show their agreement to attend the banquet. This custom has been passed down to this day and has become an important element in China's traditional culture.