Complex sentence: Starting from the 17th century, when the "Shixian Calendar" of Qing dynasty was adopted, the solar year is determined by the real tropical year instead, and the solar terms correspond to intervals of 15 ° along the ecliptic.
Split into simpler sentences: Starting from the 17th century, when the "Shixian Calendar" of Qing dynasty was adopted, the solar year was determined by the real tropical year instead. The solar terms correspond to intervals of 15 ° along the ecliptic.