When sourcing this product, the second concern should be the material itself. Since various types of materials can be used in manufacturing, customers may have specific requirements. It's essential to investigate whether these manufacturers can produce the product using the required materials. In some cases, it may be necessary to visit the factory to inspect the quality of the materials used in production. Only when the material quality meets the standards can the final product meet the basic performance requirements. The third consideration is whether the products produced by these manufacturers meet the required specifications, as relevant regulations govern this aspect. If they can meet the requirements, that's ideal. However, if they fail to meet the legal standards, such products should not be procured.