Five thousand can make a glass, and there are many places to learn. But most of them are deceptive, remember, remember. The best way to learn is to practice by yourself, then sum up experience and form your own style. But before you make a firm offer, you must make some simulation disks, and at least be familiar with the use of the software. . . . . Some people make a lot of money in this market, while others lose everything. It all depends on a person's talent and ability to control the market.