What is the origin of western new law almanac?

When the Qing soldiers entered the customs to establish the Qing Dynasty, the missionary Tang Ruowang took the opportunity to slightly modify the "Chongzhen Almanac" into 103 volume and dedicated it to the Qing government, saying that it was a new method established by his years of manufacturing documents and personal observation. At that time, the Qing dynasty had just entered the customs and founded the country, and was in urgent need of a new calendar to be promulgated in the world, and immediately agreed to adopt it. 1644 1 1 In June, Tang Ruowang was appointed as the prison supervisor of Qin Tian, and the almanac submitted was called the Almanac of the Western New Law, and the almanac compiled accordingly was called the Almanac of the Constitution. In fact, this is Xu Guangqi, Li Tianjing and others presided over the compilation of the Chongzhen Almanac.