Baozi, or simply bao, is a type of yeast-leavened filled bun in various Chinese cuisines. There are many variations in fillings and preparations, though the buns are most often steamed. They are a variation of mantou from Northern China.
Meat-filled baozi for sale in a market
Char siu bao
Tianjin Goubuli
Shanghai Xiaolongbao
Steaming is a method of cooking using steam. This is often done with a food steamer, a kitchen appliance made specifically to cook food with steam, but food can also be steamed in a wok. In the American southwest, steam pits used for cooking have been found dating back about 5,000 years. Steaming is considered a healthy cooking technique that can be used for many kinds of foods.
Traditional rice steamers in Laos
Two types of steaming vessels, metal and wood with bamboo
A simple hearth with a metal pan holding two wooden steaming vessels and a wooden lid used in Japan
A makeshift steaming vessel with lid removed; a frozen dish is placed on a metal frame in a single handled wok with water.