Generally, find a supplier who often cooperates with you, and then find one or two backup suppliers, so that you can take the initiative.
3. Beginners can go to Anxin Mall to know the price at first. The electronic materials on it are complete, but they are more expensive than those on the market. After reading it, you will probably have a score. If you know more, you will be familiar with it.
4. Find the best price and save costs for the factory.
5. Practice your eyes and identify fakes.