The query method is as follows:

1. Observe the trademark: The authentic trademark is exquisitely made, with clear fonts and patterns, and no blur or roughness. Check the details of the trademark, whether the lines of the font are clear, and whether the colors of the pattern are bright.

2. Observe the texture and workmanship: Genuine Yalu products use high-quality materials and fine workmanship. Pay attention to the texture and feel of the product. The genuine product will have better texture and comfort.

3. Scan the QR code for verification: Yalu’s authentic products will have a barcode or QR code printed on the product packaging or label. You can use your mobile phone to scan the code and confirm the authenticity of the product through Yalu's official verification channels.

4. Purchase channels: Choose formal purchase channels to purchase Yalu products, such as official websites, formal retail stores or authorized e-commerce platforms. Avoid buying products from unknown sources to reduce the risk of buying fakes.