To identify the authenticity of Stanley Sanan compound fertilizer, you can refer to the following methods:

1. Check the outer packaging. The outer packaging of regular products should have the Stanley trademark, the manufacturer's detailed address, after-sales phone number, manufacturer's QR code and other information. Check whether the packaging is complete and clean, with no obvious flaws or traces of secondary packaging.

2. Check the anti-counterfeiting signs. Stanley Sanan compound fertilizer usually carries an anti-counterfeiting mark, which can be checked by logging into the designated website by scanning the QR code on your mobile phone. If the anti-counterfeiting mark is unclear or cannot be checked normally, it may be a counterfeit product.

3. Call the anti-counterfeiting phone number. There is usually an anti-counterfeiting phone number on the package. Call this number to check for information. If the call cannot be dialed or the information is incorrect, it may be a counterfeit product.

4. Observe the color and texture of the fertilizer. Genuine Stanley San'an compound fertilizer has a uniform color, a certain degree of moisture, a soft but not sticky feel, and a fine and even texture. Counterfeit products are uneven in color, dry, hard and rough.

5. Check the fertilizer particles. Genuine particles have uniform size, high hardness and are not easily broken. If the particle size and color are uneven, the hardness is not enough, or there is a large amount of powder, it may be a fake product.

6. Smell. Real compound fertilizers usually have no peculiar smell. If there is ammonia or other peculiar smell, it may be a product with low content or mixed with other substances.

7. Check the documents. Check whether there are production licenses, fertilizer registration certificates, product certificates and other documents. When these documents are complete and valid, the product is more reliable.

8. Choose official channels to purchase. Check legal sales channels through the official website of Stanley Sanan Company to ensure you purchase genuine products.

9. Pay attention to price and merchant reputation. Products that are priced too low or have a reputable seller may be counterfeit and should be avoided.

10. Through these methods, the authenticity of Stanley Sanan compound fertilizer can be effectively identified.