He found that there were three major mistakes in the popular Yuan Jiali Calendar at that time, so he wrote to Emperor Xiaowu of Song Dynasty and suggested adopting his Daming Calendar, which was calculated accurately and scientifically after years of observing the astronomical phenomena, careful analysis and research, and opened up a new era in history. Unfortunately, this advanced calendar was vilified and obstructed by conservative dignitaries. Zu Chongzhi, not afraid of power, argued and wrote the famous Refutation. This well-founded paper refutes the fallacy of conservatives to pieces, and embodies the noble quality of Zu Chongzhi who is not afraid of power and dares to uphold the truth; This also shows his talent. The rulers of the Song Dynasty did not adopt Da Liming. It was not until 10 year after Zu Chongzhi's death that Liang Wudi approved the implementation with the repeated recommendation of his son Zu Riheng, and it has been used for 80 years.