What I am talking about is the Baoding iron ball, and the specific pattern is cloisonne, dragon and phoenix. Although this technology has been around for hundreds of years, it has no collectible value. It is only used by people in Baoding for fitness. It is usually common to play with two balls (one pair of balls) in one hand. You can also see playing with balls in various competitions. Lots of skills and talent on display. It is now widely popular all over the country.