Your goods arrived here this Tuesday. Before we pay the balance 30%, we need you to understand the following points:1. The back stamp is not as clear as it should be! It is not black. It looks more like blue and the edges are blurred. That decreases the quality and prestige of our brand. Pls find a way to improve this problem, also for model B.2. Our sales dept. is complaining about lack of products because of the delay. We are losing money cause the lines of these products are not complete. The reason: you have shipped out the goods with a month of difference.As we want to have a long-term business relationship with you, and because this was the first time, we didn't cancel the order. But we are afraid that we have to discount 4% of the total amount as a compensation of the money we lose and the bad quality in back stamp that affects our brand prestige.Kindly understand and wait for our payment!