The cycle of the twenty-four solar terms is the year of return.

Yes Tropic year: also known as solar year, refers to the time interval when the average sun passes through vernal equinox twice in a row, that is, the time when the sun center passes through vernal equinox to vernal equinox from west to east along the ecliptic. The tropic year is a four-season cycle, and it is also the cycle of the earth's revolution like the sidereal year. They have different time systems because they use different time systems.