First put the picture on copy paper, copy it to Korean paper, then color it, and when it is slightly dry, draw ink on the back of Korean paper. Of course, it's not dilution, just one layer, not all, only in a dark place. After drying, gently rub it to get the incentive effect, but it should be painted on the front part first, and then stroked with gold powder. Of course, for the sake of beauty or later mounting, it is also possible to fill it with color or silver powder.