with the development of science and technology, people's lifestyle has changed more and more convenient. nowadays, young people usually go shopping online instead of in physical stores. shopping online has a lot of advantages, but it also has some problems. for example, if you're going to buy a new shoes, you could get it by just swiping your phone a few times and waiting the package at home. but you couldn't put on the shoes to try whether the shoes are suitable, and if it's not, you must send back the shoes to take another one. in the end, I have some advices to people who are used to shopping online.