Make tea leaves into strong tea water with boiling water, spread the drawing paper on a clean wooden surface, brush it evenly with a soft brush dipped in strong tea water, then gently take it off, then stick it vertically on a flat wall, blow air in the middle to prevent it from drying, then take it off, and then take it off after drying.
The effect is just like the ancient brown painting, antique, antique, and you can also let a professional table painter take a grapefruit.
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