What is the big round dish of tea set?

The jar in the tea set is the lid, which refers to the vessel for placing the lid of the pot, the lid of the plate and the lid of the cup. It can not only keep the cover clean, but also avoid wetting the desktop. The cover is generally made of porcelain, purple sand or bamboo products, and the common shapes are cushion-supported (shaped like a dish-shaped cup holder) or bracket-supported (cylindrical). Although the cover is small, it also plays an important role.