What is the life span of German pianos and domestic pianos?

This figure is just hearsay. The design life of domestic pianos is generally 20-50 years, and that of German pianos is generally 50-70 years. Piano is a consumable, not a diamond. . . The wool hammered out with a string hammer for so many years has long been hardened. . . . Domestic pianos, including the domestic Yamaha Kawaii Pearl River, all contain some elements of cutting corners, while the piano materials made in Germany are genuine materials with amazing accuracy. Others sell genuine materials and high-tech products.