This is a later 20th century blue and white porcelain vase featuring a dragon that was produced for export from China. Although the mark may state that this is Qianlong Qing Dynasty it is important to understand that marks such as these on Chinese wares mean they are made in a style that arose in that dynasty. This was not made during the Qing Dynasty. The mark on this is stamped and not hand executed. The estimate is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.