There are several ways to identify the authenticity of Mengjinyuan pendant:

1. Check the trademark: The real trademark of Mengjinyuan Jewelry should be clear, without ambiguity, dislocation, mottling and other defects. If there is something wrong with the trademark, it may be a fake.

2. Check the security code: Every piece of Mengjinyuan jewelry product will have a unique security code. You can check the authenticity through Mengjinyuan Jewelry official website or the security website.

3. Check the packaging: The packaging of real Mengjinyuan jewelry products is usually exquisite and the details are handled perfectly. If the package is found to be loose and incomplete, it is likely to be a fake.

4. Compare prices: If the price is too low, it will often arouse suspicion, because the price of brand jewelry is generally more expensive. If you find that the price is too low, you need to carefully check the authenticity of the goods.

5. Use magnets: If the gold works of Mengjinyuan are firmly attracted by magnets, then such gold ornaments are not pure gold. However, some fake gold can't attract magnets, but it doesn't rule out real gold jewelry. You need to try the thickest part of gold jewelry. Because the weight of a gram of gold jewelry is very expensive, such as the gold jewelry necklace in Mengjinyuan, a magnet should be attached to the thickest position of the gold jewelry necklace.

The above methods are for your reference, subject to the actual product description.