[chs]

displays the solar term, on the date when one occurs, and nothing otherwise.

[chss]

displays the solar term, on every day.

[chs1]

[chs2]

displays the first or second characters of the solar term individually (useful to display them vertically).

[chds]

displays the lunar day (like the [chd] token) but replaces it by the solar term, whenever one occurs (this is analogous to the :chls minicalendar modifier).