Sixty-year-old Taiwan compatriot working as a "newcomer" in catering in Chongqing: life is valuable in "experience" Wang Guanzuo has only been in the catering industry for a year and a half and is a technician who retired from the automobile industry. He believes that the shift from making technology to making food seems to be a big change, but in fact it is not.

The key lies in "oring carefully" to input raw material costs, daily expenses, operating income and other data into computer analysis.