It is a "tray", most often made of bamboo, with holes and a tray, which serves as a reservoir for spilled water or tea during the tea ceremony. During the tea ceremony, water is mainly poured into the tray to rinse the teaware or even the remains of tea.
The name "tea sea" comes from the poetic nature of the traditional Chinese tea ceremony, which emphasizes the balance, harmony of flowing water and the boundless hospitality of the host who shares tea with his guests. It depicts an atmosphere of openness and acceptance.
Tea Sea (茶海, chá hai) is used in the traditional Chinese tea ritual Gongfu Cha.