1. Search the company's information on Google to find out if there is an information record. An excellent brand manufacturer will definitely establish its own official website, and write down its main business, display its good products, and countless accurate and interesting articles.

2. Whether the business personnel are professional. When communicating with the company’s business personnel, ask more professional information to see if they can answer. Professional and well-trained business personnel will provide you with the best service and price.

3. Is the delivery speed fast? Excellent suppliers will arrange production reasonably to provide the most stable and fastest shipment.

4. Whether to provide the latest information. Excellent suppliers will take the initiative to provide the latest industry information or popular products for you to choose from.