I saw a shell company on Taobao and wanted to buy one. Can it be used for business? What's the difference with a normal company? What about the legal representative?

Can be used for business. Shell companies, that is, after registering companies, have not done any business. As for the difference between it and a normal company, that's about it. But if you want to buy it, you must prove that the company is fine, and you must look at the accounts, such as no debt and nothing illegal. After confirming that there are no problems, change the legal person and transfer the company to the legal person name you specify.