How much does it cost to open an inn in Yangshuo or Lijiang? I don't want to make a lot of money, I just want to live comfortably. Is this idea reliable?

The amount of investment depends on your scale, generally at least 200,000-500,000. Let me help you analyze: there must be a lot of competition in local inns like Yangshuo or Lijiang, and this situation will become more and more fierce. Otherwise, it will be very distinctive and the cost will be higher. Many petty bourgeoisie have thought about your idea, but it is not feasible.