I want to learn guitar in Beijing, and the music store wants me to take a class at 100. It feels too expensive!

This price is very reasonable. The first thing to learn guitar is to practice your hands. A good teacher will show you the way and let you take fewer detours. Cultivate your sense of music slowly, learn some necessary knowledge of music theory, and don't talk nonsense.

After you have a certain foundation and come into contact with more guitar playing styles, you will find out what kind of guitar playing style you like, and pay attention to understanding and learning. A good guitar teacher should give you guidance in these aspects.

So this price is really not expensive.