This object originates from southern China. The first known reference to this object was in 1059 A.D. China is the world leader in production of this item, producing about 1.2 million metric tonnes. What is it ?
This object originates from southern China. The first known reference to this object was in 1059 A.D. China is the world leader in production of this item, producing about 1.2 million metric tonnes. What is it ?