If it is Chaoyang District, Beijing, I know two musical instruments, one is Sky Tianfan Musical Instrument Store, the other is Sunshine Art Musical Instrument Store, and the other is Shangyin Musical Instrument Store, which has a home page on the Internet. You can go and have a look. It's a second-hand piano, and there are also training courses. If I'm afraid of regret in the future, I suggest going to a training class and practicing in the piano room of that music store. A piano is expensive after all.