During the solar eclipse in May of the second year of Chongzhen, Xu Guangqi's calculation was the most accurate compared with that of Western France, so the Ministry of Rites requested the establishment of a calendar bureau. With Xu Guangqi supervising the revision of the calendar, the revision of the calendar was finally on the right track, but later the Manchu invaded the Central Plains, and the revision of the calendar was actually not completed in the Ming Dynasty. At that time, China people who helped Xu Guangqi revise the calendar included Li Zhizao and Li Tianjing, and foreign missionaries included Niccolo Longobardi and Xiong Sanba. [ 10]