The reinforced solid wood soundboard made of carefully selected white pine wood is processed through long-term natural air drying and strict manual drying procedures to achieve moderate string pressure and soundboard curvature, allowing the piano to maintain pure and full sound quality in any environment The uneven thickness craft soundboard perfectly combines the resonance required for sound according to the different levels of resonance required for the bass, midrange, and treble regions, with varying thicknesses of soundboards in different areas