When selling any product, salespeople should cultivate a mindset of confidence in the products they are selling. Many times, resellers like us lack full confidence in our superior wholesalers or manufacturers. Here, I want to say that if you don't have confidence in your wholesaler or manufacturer, then never sell these products because it will affect your confidence during the sales process and cause you to lose many potential deals. Due to lack of confidence, you may sound unsure when answering customer questions, unable to reassure them, making it difficult to establish trust and resulting in lost opportunities. Therefore, when selecting our sources, we must compare and contrast again and again, thoroughly understanding the relevant clauses and services on their websites, as well as reading the product descriptions carefully. We also need to learn the related professional knowledge. For websites that interest us, it's best to buy one item for ourselves to try out. Only in this way can we build trust and confidence in the wholesaler or manufacturer, thereby establishing the necessary confidence for sales.