刘宇一教授说，这块雨花石是他五年前在南京郊外一个雨花石加工场的路上拣到的，回家后仔细端祥，发现了其上的“中国版图”。

• Professor Yuyi Liu said that he picked up the stone on the road to a yuhua stone processing plant in a suburb of Nanjing five years ago, and after he returned home he carefully inspected the stone and discovered the "territory of China " on it.