1. Each barrel of Nongfu Spring has an anti-counterfeiting label on the mouth of the barrel. Scratch off the silver-gray coating before drinking.

2. Then call the inquiry hotline or text the anti-counterfeiting label. Enter the number, and the query result confirms that it is authentic. "Drinking good water brings health, please feel free to use it." It means that the product is genuine.

3. Look at the laser barcode on the seal, which is the production date; the production date is printed with a laser and has a deep mark. Find the anti-counterfeiting barcode on the seal.

4 . Use the PH test paper issued by Nongfu Spring to test, because Nongfu Spring is weakly alkaline water and you will know it by just testing it. Put the PH test paper into the cup containing Nongfu Spring water (you can ask for the test paper from the water delivery company. All Nongfu Spring water sellers can ask for it. Of course, you can buy it at the drugstore yourself)

Shake it a few times and wait for 2 minutes to see what color the water is. Nongfu Spring is turquoise because it is weakly alkaline water.