There are too many questions. Wood should not be exposed to the sun, soaked in water, hot or cold, and should not be near the radiator. Just keep it in a cool place for maintenance. Tian Yun is a brand in Yangzhou. If you are a beginner, you can use one of around 3000, and then change it after playing. Hang up if you don't learn well, as a decoration. It took three or five years to learn it well. So at that time, you might even know what a good piano is.