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bao (simplified Chinese: 叉烧包; traditional Chinese: 叉燒包; pinyin: chāshāo bāo; Cantonese Yale: chāsīu bāau) is a Cantonese barbecue-pork-filled bun (baozi)

The heat conserved within would slowly cook the food inside, saving fuel and work. An example of this type of cooker was found in Wales by a Monmouth