How long can jiaozi in Chengdu be put in a foam box now?

It can last about 12 hour. If there is no ice or other auxiliary materials to maintain the low temperature, the foam box cannot maintain the low temperature environment for a long time. Frozen food will go bad after thawing, which can last about 12 hours. Chengdu, referred to as Rong for short, is also called Rongcheng and Jincheng. Located in the middle of Sichuan Province, Chengdu is the capital and sub-provincial city of Sichuan Province, and one of the first national historical and cultural cities in China.