You can't always be free. There will definitely be a place to charge, and eventually I will ask you for money. If you want to learn this thing, you should not care about money, but about time. My friends have been trained in Huaxin and Neusoft before, and they are all relatively formal. Now some of them are in IBM, and they are generally good. You can think about it. But there are too many people in this industry now, and there may be few opportunities and fatigue after embarking on this road. I hope you can adopt it.