In order to observe the celestial phenomena, the team cooperated with Liang Lingzan, a machinery manufacturer, to make ecliptic instruments and water elephants. On the basis of mastering a large number of measured data, the line re-measured the positions of more than 50 stars in/kloc-0, and found that the positions of these stars recorded in ancient books did not match the actual positions.
From the 12th year of Kaiyuan (AD 724), a group of people presided over a large-scale astronomical geodetic survey. Among the national 12 observation stations, a group of observations by Nangong Shuo et al. in Henan Province is the most successful. After a row of calculation, the meridian length of one degree is obtained, which is the first meridian measurement in the world.
Starting from the 13th year of Kaiyuan (AD 725), a group spent two years compiling the first draft of Dayan Calendar into 20 volumes, which corrected the mistake of dividing the whole year into 24 solar terms on average in the past, and was a major reform of the calendar in China.
The delegation also compiled Kaiyuan Dayan Calendar, Seven Political Calendars, Book of Changes, Mental Arithmetic, Accommodation Ceremony, Yao Qixing Bie and the Law of Protecting Beidou. In order to commemorate the achievements of this bank, people named asteroid 1972 as "a row of asteroids".