YB 122CS is a very popular model in Yingchang. Up to 70% of the pianos in Yingchang are made of solid wood. It has been 57 years since Helen built the piano for 8 years, and the stability of the product has not stood the test of the market. The future is an ambiguous answer.
There are many reasons why the keys can't be played. No brand dares to say that its piano will never be played. This is just a matter of mechanical cooperation, not quality. On the contrary, it also shows that materials are used enough, and thermal expansion and cold contraction are the physical characteristics of wood itself. Every brand of piano needs a stable period to adapt to the temperature and humidity changes at home.
Cast iron technology, Yingchang's iron plate is vacuum cast, which has stronger stability and longer durability. It is also the only factory with vacuum casting technology in China. The quality of the steel plate has nothing to do with the color, so there is no need to entangle the color.