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Đoạn dịch đây các bác 0:12 Wang Xin - WS player 0:19 Forehand Serve 0:22 Serving is vital for a match, it determines if you can take an advantage in a match - i will help you out. 0:30 Firstly,your standing position is vital for service, Firstly both feet at shoulder width 0:39 Watch your opponent, not the floor or shuttle 0:42 Also your racket hand must be waist height, not higher or lower 0:48 Secondly, when serving your action must flow 0:51 If you are left handed, follow through to your right shoulder 0:56 If you are right handed, follow though to your left shoulder 0:59 Thirdly, whether serving high or short, use your wrist to control 1:05 Use your arm to push your forearm to push your wrist