How to understand the 57 degrees in the 24-Qi pull-up

Every night in the middle of the night, I stand up straight, with my hands on my back, my left and right hands holding five or seven degrees, and kowtowing with my breath held. Twenty-four Qi-Guiding Skill is a set of internal skill created by Master Chen Tuan according to the corresponding relationship between Qi-Qi and human meridians in 24 solar terms in a year, so as to cultivate internal qi, dredge meridians, protect viscera and eliminate diseases.