Among the 24 solar terms in China, are two adjacent solar terms equal in time?

Roughly equal, each solar term is about 15 days, because each solar term is reflected on the longitude of the Yellow River at the same interval, that is, 15 degrees, but the actual orbit of the earth is elliptical, and the revolution speed is fast at perihelion and slow at aphelion, which corresponds to winter in the northern hemisphere and aphelion to summer in the northern hemisphere, so the 24 solar terms are separated as a whole.