2. The company name is essentially the same as the company name (also known as enterprise name and company name). But the company name is the full name and the trade name is the abbreviation. For example, my company's name is Hangzhou Wuzhou Trademark Service Co., Ltd., and the brand name is Wuzhou. Other words are common names.
Third, the relationship between trade names and trademarks is not necessarily related in essence. A company named Wuzhou can register a trademark called XYZ (whether it can be registered successfully is another matter). But the law allows companies to register like this.
In fact, there are many enterprises with different brand names and trademarks in real life. For example, an enterprise named Nongfu Spring applied for a trademark named water-soluble C 100 and so on.
Of course, the unification of trade names and trademarks still has its advantages, at least it can save advertising costs. But this is not inevitable. I won't say much here, because there are too many things to say, lest you be too lazy to read them.
If you want to know more, you can search "Wuzhou Business Network" by Baidu and Google, specializing in intellectual property services. I hope I can help you.