Which job do you want to do well is more bitter and tiring? Just selling things. What's so hard and tired? In contrast, jewelry needs more language skills. After all, the other party is here to spend a lot of money. Computer accessories need more computer hardware knowledge and some basic computer knowledge, while mobile phone accessories are nothing but power supplies, headphones, data cables, patches and the like, which do not need any knowledge and belong to the work that primary school students can do.