If you play with Wan Wen walnuts, it should be better to have a lot of sweat on your hands, because as the saying goes, you can sweat walnuts. Among so many kinds of books, walnuts and gourds prefer sweaty hands. As the saying goes, it takes three winters and two summers for a good pill to play with walnuts, which means three winters and two summers. In winter, most people don't sweat. Playing walnuts at this time is mainly polishing, but in summer, people sweat, which is more common. At this stage, walnuts are mainly colored. If you sweat a lot, playing with walnuts will help you color walnuts. Of course, if you sweat too much, it may also lead to some bad walnut skins and dull colors. This is because the cortex of these walnuts is thin and the pressure is not strong. After being soaked in sweat, it may not be red, but it will be sauce-colored. It seems that the overall color is dark and black, which is not very nice. Walnuts like this need to be brushed less, so you need to brush them with bristles after playing for a while.