This vessel is called a 'yan' in Chinese, meaning a 'steamer'. It is made up of two parts - a bowl with apertures on the base, and a tripod. Water would first be poured into the tripod, and a bamboo basket containing food would be placed in the bowl. Fuel would be burnt beneath the tripod, causing the water to boil and send forth steam to cook the food.
The Chinese name for this vessel is yan, meaning a 'steamer'. It has two parts - a bowl with holes on the base and a tripod.The cook would fill the tripod with water and place a bamboo basket containing food in the bowl. A fire would be lit beneath the tripod to make the water boil and give off steam to cook the food.