There are the following methods to check the authenticity of Langdi batches:

1. Official channels: The most reliable way to buy genuine Langdi products is to purchase them through officially authorized channels, such as the official website , official physical stores or authorized online retail platforms. Make sure to choose formal channels to reduce the risk of buying fakes.

2. Product packaging: Carefully observe the product packaging and check whether there are traces of unpacking, damaged or irregular labels, etc. Authentic products usually have complete, clear and detailed packaging.

3. Trademarks and logos: Check whether the trademark, brand logo, model and serial number on the product are clear, accurate and consistent with official information. Some counterfeit products contain misspellings, ambiguities, or incorrect placement.

4. Accessories and quality: Pay attention to the accessories and additional items that come with the product, and compare them with the officially provided accessories. At the same time, carefully check the workmanship and quality of the product, genuine products usually have higher manufacturing process and material quality.

5. Online reviews and feedback: Before purchasing, you can search and read reviews and feedback from other consumers to understand their purchasing experience and product quality. This helps tell the difference between the real thing and the fake.