If I were a catering boss, I would like to take a summer job. The catering industry is generally short of people, especially during the Chinese New Year, when summer jobs are just on holiday, there are many people who want to work to make money. Summer vacation workers usually have a college degree. If you meet foreigners, you will communicate better when ordering food than people who have never been to school.
If I were the boss of an electronics factory company, I might also take a summer job, but for the summer jobs recruited, they would not be required to do some design work. Just let them do some assembly line work. After all, technology is the core of the electronics industry.
If I were the boss of the glasses industry. I won't hire a summer job. The glasses industry needs some relatively professional knowledge and needs to train these practitioners. Because he is a summer job, it is possible that he will leave as soon as the training is over after working for a short time, which wastes the cost of training in the store.