I plan to open a cost consulting company. Can I call someone else's? How to operate it?

There are many peers, and you are a layman. I advise you not to go in. Don't do it if you don't have enough money If you belong to another company, you must negotiate this. Generally, the membership fee is given first, and then the annual fee is given. It's hard to say the price, but you have to say it yourself. Just say a few more words. But some companies are afraid of risks, that is, if you do something bad, they will suffer. Generally, only the low-end ones will let you join.