Over 2,000 years ago the Han Dynasty envoy Zhang Qian (d. 114 BC) traveled into the western regions, writing a great page in the history of global cultural interchange. Many important agricultural crops such as grapes, alfalfa and walnuts are reputed to have entered China at that time.
兩千年前，漢代張騫出使西域，寫下偉大的世界文化交流史，葡萄、苜宿、胡桃等許多重要作物，相傳都是當時進入中土。