1, barcode and inquiry code verification: products of Mengjinyuan will have a barcode and inquiry code, and you can enter an inquiry on the website of the National Gold and Silver Quality Supervision and Inspection Center to verify the authenticity of the products. You can also scan the QR code on the product for inquiry. Look at MJY9999 or Mengjinyuan 9999, Mengjinyuan 999 and so on. And the product label has obvious Mengjinyuan trademark. If not, there is probably a problem.
2. Use an unglazed ceramic cup: You can put your jewelry in an unglazed ceramic plate. If your gold jewelry in the Dream Garden is real gold, you will leave golden stripes on the unglazed ceramic plate. If it is a fake gold bar, it will turn black.
3. Use nitric acid: This is the method used by most jewelers for their own internal tests. Take a drop of nitric acid and drop it on the gold jewelry in Mengjinyuan to see if there is any reaction. If nitric acid produces a green reaction after dripping nitric acid on gold jewelry, it is a fake. If nitric acid drops on gold jewelry, the reaction is milky white, which means that this gold jewelry may be gold-plated pure silver, not real gold jewelry. If nitric acid drops on the gold ornaments and there is no chemical reaction, it means that the gold ornaments in your dream gold garden are real gold.