1, the smell of hydrogen peroxide and dye residue. This is the most traditional craft. Bamboo seed slices were oxidized and disinfected with hydrogen peroxide and then dried. Dyes will be added to the boiling process of seeds as appropriate. The taste is sour at first. This smell is difficult to eradicate, and it can only evaporate slowly, because the smell has penetrated into the seeds. Pay attention to ventilation at ordinary times, or wipe it with a wet towel.

2. The taste of compound glue. The back of the mahjong mat is compounded with base cloth, which is bonded with adhesive. It uses an environmentally-friendly adhesive, which has a pungent smell and the possibility of formaldehyde exceeding the standard is very high. This can't be carved from the roots, it can only evaporate slowly.

3. The taste of bamboo itself.