Pig's trotters are pig pancreas, also called sand liver, and pig spleen. Spleen is a hematopoietic organ, in which lymphoid tissue can produce lymphocytes and monocytes. In addition, it can also remove aging dead red blood cells, bacteria and foreign bodies, and has the function of filtering blood. At the same time, it has the functions of storing blood and regulating blood volume, and also produces antibodies.

Pig pancreas is a pig pancreas, flat and long, about 12 cm long, pink, with some white oil hanging on it. Pig pancreas and pig spleen are two different things, so don't confuse them. Flat strip, about 12 cm long, pink is pig spleen. Pig pancreas is irregular in shape, similar to fat, but dark in color, and has granular lumps when pinched by hand.