What serve does Ma Long use?

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If I look at his serve, i cant see where his bat hits the ball. It just looks like he goes straight behind the ball and than goes forward with his bat. I doesn't look like a pendulum serve (i think) because i cant see his wrist movement go to the side of his body. This is maybe a lot of bullsh1t i just wrote but can someone help me?


I saw it in this video: https://www.youtube.com/watch?v=68mmisrB1Uo
 
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