Wan Wen walnut is not an edible walnut in the general sense. It should be a kind of Vajrayana Bodhi, the price is not certain, and the selection standard is: 1, a big one. 2. Match. 3. Beautiful. Taobao sells it online and weighs it by the catty. If you want a high standard, you may have to work hard, buy and sell, and keep the best and biggest. Those literary masters should all play like this.