The main effect of Huangguokang is to quench thirst, wake up wine and diuretic, the reason why it has this effect is closely related to the sexual taste and meridian. In terms of color, the color of Huangguokan is yellow, which corresponds to the position of spleen and stomach of human body, because spleen and stomach are earth, and the color of earth is yellow, so Huangguokan is used for the spleen and stomach of human body. In terms of taste, it is sweet, sour and cool in nature, so it has the effect of clearing heat and fire in the spleen and stomach, and it also has the effect of quenching thirst because it is sour in taste. Therefore, the main effect of Huangguokang is to clear heat, promote the production of body fluid, stop cough, and also has a certain effect of water. For the spleen and kidney deficiency cold people, too much consumption of yellow fruit citrus will lead to diarrhea, resulting in the human lung, spleen and kidney in the Yang Qi too much damage, so for the suffering, which will lead to further damage to the body, so for the deficiency cold people, it is not recommended to eat too much yellow fruit citrus.