You can go to major tennis venues, such as Haidian Gymnasium, where there are basically training courses, from junior to advanced. Or you can check online, there is that kind of personal trainer. However, no matter where you are, you have to report to the first phase of the primary learning class for 800 times and learn 9 to 10 times. Two hours at a time.

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This website has classes. My friend learned it there and taught it well.