Su said while repairing a kitchen nearly a decade ago, he took shiny black bamboo down from the roof, and a piece was scratched, revealing its white stalk. He carved a portrait on the piece of bamboo, and then the idea of drawing pictures from smoke was generated (Photo: VNA)
The picture base is put above a cooking stove to be smoked for three months to attain the right colour (Photo: VNA)
Su etches small lines with a needle, then he scrapes off the black smoke layer using a small knife (Photo: VNA)
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