Purified water used in syrup manufacturing process must be freshly prepared, and the storage time of deionized water cannot exceed 24 hours. If it exceeds 24 hours, it must be reprocessed before use. If compressed air or inert gas is used, it must also be purified. In the preparation process, if heating and insulation is required, it must be strictly heated to the specific temperature and kept for a specific time. When the solution is mixed with the excipients, if it is necessary to adjust the content, PH value, etc., it needs to be re-evaluated and reviewed after adjustment.