Which quality is better, lean glasses or bag glasses? What is the difference? Which is cheaper?

Everything is the same, one thing to remember is that the bigger the store, the more expensive it is, because there are all kinds of expenses and they must be included in the product. The only difference between the two is that Bao Dao has chain stores in many cities, and the after-sales service will be better. It's still cheaper online now. You can surf the internet when you have time.