What does it mean to waste eight defeats?

Should it be four wastes and eight defeats? Four wastes and eight defeats, four wastes represent four seasons and eight defeats represent eight branches, all of which are birthday branches! Four Wastes: Spring, Gengshen, Xinyou, Summer, Renzi, Guihai, Autumn, Jiayin, Mao Yi, Winter, Bingwu and Dingsi.

Tea method: where there are more than eight kinds of four-column daily stems and branches, the seasons are right.