Test HSD is a tool-type application that helps users check the expiry date of goods being sold or in stock. When users enter the production date and HSD date, the App will calculate the current date of sale or not. , or whether there is still a deadline to allow warehousing for business in the coming days or not, through which the user decides to put the goods back into the warehouse and not continue to do business and come up with a solution to liquidate goods that are close to their expiration date. Avoid loss of goods that affects business efficiency.