Purchased LP171WU5-TLB1 20 pcs first as samples from them, and first order was good. The panels worked and were acceptable. Continued with a 400pc order and the goods received were all junk. Broken panels, used panels, damaged and scratched panels, relabeled panels, you name it, they sent it. All of it was ***. None of it worked, not a single piece. Sent them back and was never refunded. Called on a daily basis, asked the local police to intervene but with no avail. Thievery of great magnitude. Stay away frok this company and Mike Qiu at all costs. He will go on stealing until someone stops him