Friend, Yan Di is still good, but any product varies from person to person. The poor do things, the rich do markets, and businessmen do trends.

Teacher Jingui's suggestion is ok, if you want to specialize.

Need to know more about this industry and see if it suits you.

If it suits you through understanding, it's not bad to try.

As the saying goes, only those who ask the right questions can do the right thing.

Don't feel for yourself, you won't get lost if you ask for directions.