Did you go to Yunnan with the tour group? I come from Yunnan. Frankly speaking, Yunnan tour group is very unreliable. I often take tourists to some so-called jade tea sales points, which are good and cheap! In fact, anyone who knows a little about the market knows that they are selling at a high price. If you still have invoices, receipts and other documents, please appeal and file a lawsuit! Put an end to these businesses!