What new calendar did Guo Shoujing make after careful calculation?

According to the observation results, Guo Shoujing made a precise calculation. After four years, by the year of 1280, he made a new calendar, which adopted the old saying of "respecting people" and named it "time calendar". Chronology calculates that there are 365.2425 days in a year, which is only 26 seconds away from the time when the earth makes a circle, which is the same as the Gregorian calendar prevailing in the world, but 300 years earlier than the Gregorian calendar.