In the period of Spring and Autumn, a jewelry dealer from Chu state was trading pearls in Zheng state.
春秋时期，有一个楚国的珠宝商人在郑国做珍珠生意。
246BC Ying Zheng becomes King of Qin state and begins work on his tomb.
公元前246，嬴政称秦国国王，开始大兴土木建造自己的陵墓。
Zheng, who holds a masters degree from Ohio State University, is a pioneer in China's biochemical and nutritional research.
本月将度过108岁生日的郑集是我国生物化学和营养学研究先导者之一，拥有美俄亥俄州立大学硕士学位。
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