What's the inside story of that kind of investment consulting company and securities company?

These companies usually recruit people back to the company under other names and positions. After that, their so-called "training" is actually brainwashing, let you see how big the profit of that bank is, how much money you can earn if you can open an account, and so on. Most of them are fraud companies. When you really bring the client in, it may not give you much money. Don't say you don't have clients. If you don't have customers, you won't give a dime.