Question 4. Extreme Challenge is the fourth issue of Yun-peng Yue's Back to the Crystal. Extreme Challenge is a reality show launched by Dragon TV, with artists including Lei Jiayin, Yun-peng Yue, Wang Xun, Jerry, Guo Jingfei and Justin. This program shows the natural and cultural features and historical and cultural details of western China through the way of guests experiencing extreme challenges. In the fourth program, Yun-peng Yue and Jin Jing played a last stand, and whoever reached the finish line first won. Because of Jin Jing's poor health, Yun-peng Yue offered to carry Jin Jing all the way, which showed his kindness and friendship.