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- The healthy iron ball ---cultural gift of China The healthy iron ball is a traditional product known at home and overseas.the baoding iron ball stands at the 1st place of the "three treasures of Baoding", the history of iron ball started from Song dynasty (960---1127AD), during Ming dynasty (1368---1644AD), it was fashioned into the whole China. Just as its name implies the ball is made of iron but it is hollow with a soundboard inside,...