It's not expensive, it's not joining, and there's no such messy expenses. Besides, learning technology is a lifelong job, but there is a good way out after learning it. I know Nanjing Gaoji Shaanxi noodle restaurant, which is very famous and has a good business. The boss's grandparents used to make Shaanxi noodles, but many people learned her ancestral craft. What did you say?/Sorry? Go and see for yourself. Don't miss a good opportunity.