Мind your head posture. ITTF gonna to revise the service rule.
2.6.4 From the start of service until it is struck, the ball shall be above the level of the playing surface and behind the server's end line, a̶n̶d̶ i̶t̶ s̶h̶a̶l̶l̶ n̶o̶t̶ b̶e̶
h̶i̶d̶d̶e̶n̶ f̶r̶o̶m̶ t̶h̶e̶ r̶e̶c̶e̶i̶v̶e̶r̶ b̶y̶ t̶h̶e̶ s̶e̶r̶v̶e̶r̶ o̶r̶ h̶i̶s̶ o̶r̶ h̶e̶r̶ d̶o̶u̶b̶l̶e̶s̶ p̶a̶r̶t̶n̶e̶r̶ o̶r̶ b̶y̶
a̶n̶y̶t̶h̶i̶n̶g̶ t̶h̶e̶y̶ w̶e̶a̶r̶ o̶r̶ c̶a̶r̶r̶y̶.̶
v. [1] and 𝘪𝘵 𝘴𝘩𝘢𝘭𝘭 𝘯𝘰𝘵 𝘣𝘦 𝘧𝘢r𝘵𝘩𝘦𝘳 𝘣𝘢𝘤𝘬 𝘧𝘳𝘰𝘮 𝘵𝘩𝘦 𝘯𝘦𝘵 𝘵𝘩𝘢𝘯 𝘵𝘩𝘦 𝘳𝘦𝘢𝘳𝘮𝘰𝘴𝘵 𝘱𝘢𝘳𝘵 𝘰𝘧 𝘵𝘩𝘦 𝘴𝘦𝘳𝘷𝘦𝘳'𝘴 𝘩𝘦𝘢𝘥.
v. [2] 𝘞𝘩𝘦𝘯 𝘵𝘩𝘦 𝘣𝘢𝘭𝘭 𝘪𝘴 𝘴𝘵𝘳𝘶𝘤𝘬 𝘪𝘵 𝘴𝘩𝘢𝘭𝘭 𝘯𝘰𝘵 𝘣𝘦 𝘧𝘢r𝘵𝘩𝘦𝘳 𝘣𝘢𝘤𝘬 𝘧𝘳𝘰𝘮 𝘵𝘩𝘦 𝘯𝘦𝘵 𝘵𝘩𝘢𝘯 𝘵𝘩𝘦 𝘳𝘦𝘢𝘳𝘮𝘰𝘴𝘵 𝘱𝘢𝘳𝘵 𝘰𝘧 𝘵𝘩𝘦 𝘴𝘦𝘳𝘷𝘦𝘳'𝘴 𝘩𝘦𝘢𝘥.
RATIONALE.
The part of actual provision 2.6.4 regarding "hidden ball" ought to be deleted as an unfeasible requirement. In actual playgame most cases of the hidden balls would happen beyond umpire's field of vision and thus hidden services can't be recognized by umpire for a certainty.
It is hoped the newly proposed provision of the server's head posture should resolve the sore issue of hidden services once and for all.
Hidden services is a foul trick and the such must be eradicated from the sport, anyway.
Sure, Wang Сhuqin will have to quit with his sly serve, take it or leave it.
Hidden service is a foul trick and the such must be eradicated from the sport, anyway.