Especially zhongwan point. Acupuncture classics A and B: abdominal distension, satiety due to cold injury and indigestion, which are the main causes of epiglottis. Textual research on acupoint selection along meridian: all diseases of spleen and stomach are treated.
As for Guanyuan (3 inches below the navel), it is mainly used for kidney deficiency, and Shenque (that is, navel) is mostly used to restore yang and save the inverse.