Hello, pick up the seal in one hand and squeeze into the middle. Hold the ink cartridge in the middle of the seal with two fingers, gently push it out and take out the ink cartridge. Then take off the cover of the ink cartridge and slowly add ink to the ink cartridge. Drop a few drops at each position of the ink cartridge until the ink cartridge is completely covered, and then continue to put the ink cartridge on the table for five minutes to let the ink completely soak the ink cartridge. When the ink in the ink cartridge is almost submerged, slowly pick up the ink cartridge and put it back. Finally, after the seal is installed, find a piece of white paper and cover it several times. At first, it was unclear, and it was all ink. Later, it gradually became clear, thus successfully adding ink to the seal.