"They just toss some clay into their mouths and chew it around for a while, and they know whether it is good material or not. When we buy clay, the first thing we look at is the written specifications," says Cheng with a laugh.
「他們把陶土往嘴巴裡一丟，咬一咬，嚼一嚼，就知道好壞；我們買陶土時，第一件事大概是去看文字說明，」鄭永國感慨地笑道。