Generally, Compound Polyethylene Glycol is fasted on the day of colonoscopy and taken orally 4 hours before the scheduled examination time; or fasted at the beginning of dinner on the day before colonoscopy and taken orally 1 hour after the dinner time; or fasted after lunch on the day before colonoscopy and taken orally at the beginning of the lunch time 3 hours after the lunch time. Compound Polyethylene Glycol, the full name of Compound Polyethylene Glycol Electrolyte Dispersant, is used for colonoscopy and preoperative bowel content cleansing for colon surgery to reduce the absorption of water from the colon, to retain water in the colon, and to soften feces in order to facilitate fecal elimination. Cleanses the bowel for clear surgical and examination views. Compound Polyethylene Glycol is taken as a 1-liter or 2-liter solution depending on the water in which the different sizes of Compound Polyethylene Glycol Electrolyte Bulk are dissolved, stirred well, and consumed in divided doses within 2 hours. It should be noted that Compound Polyethylene Glycol needs to be taken under the guidance of a doctor and should not be used without authorization.