The Chinese calendar was subject to revision at regular intervals, from the Han period until that of the Ming. More than one hundred different systems are named, although not all of these are documented in full detail in the available sources. Although referred to conveniently as a ‘calendar’ each system is a full specification of the Sun, Moon and planets, including as a rule the lunar node and apogee. Each system therefore includes nine mean longitudes, as well as the equations of the Sun, etc. In this survey, which is confined to the mean longitudes, 35 different systems are analysed, taken from sources ranging from the Han to the Ming dynasties. The aim is to display the comparison between the nine mean longitudes in each system against modern calculations. These displays will allow one to see the striking differences between the Chinese achievement and that of Greek-Indian-Arabic practice.