一招走天涯 : Back-hand side spin dragging - 狮城黄师傅排便妙招 ：
It seems that the table tennis balls used in 2014 world cup table tennis tournament had been changed from 40 mm to 40+mm. In other words: the “old” balls had been phased out internationally. Although we do not take part in world cup but it is good to use the new balls so as to…
hkwong
