Dear customer, what we sell to you from the beginning is C-grade product. C-grade product means defective product. You know it during the entire communication process. This is your first time to import goods. Whether it is product introduction, payment or transportation, I give you the best service results throughout the entire process. In the end, you said that the product is not good just because other suppliers gave impossibly low prices for malicious competition. that is the C grade! It's unfair for you to give us a negative review. I hope other suppliers will not encounter customers like you.