Classification of deformed red blood cells such as phoenix impatiens ① doughnut-shaped red blood cells. ② Ancient money-like red blood cells. ③ The erythrocyte membrane is granular and beaded. ④ Red blood cells are different in size, the largest is 1 ~ 2 times of normal, and the smallest is 1/2, and the color is lighter. ⑤ Broken red blood cells. ⑥ Spore red blood cells. ⑦ Spiny red blood cells. ⑧ Other shapes, such as cell membrane rupture into various shapes, horseshoe shape, crescent shape, etc. Others, such as red blood cells, are serrated, condensed and the same size, which is called homogeneous type.