When it comes to the Silk Road, Zhang Qian, one of the most influential explorers of the Silk Road, will come to my mind.

Zhang Qian was a great explorer during the Han Dynasty.     1     (不管天气多坏), he never abandoned his     2     (assign). He made great contributions to opening the east­west route connecting China’s Han with the western regions. Furthermore, (he not only introduced silk and other products to the west but he also brought back many new products and knowledge of technologies of the outside world)     3     (用倒装句升级加黑体部分).     4     (激励我的是他完成探险的毅力和决心).