Of course, there were some good books on sale during the double 1 1 period last year, so I also studied them carefully and bought some. Moreover, these stores are bound to have big discounts this year for double 1 1, so you can also pay attention in advance. Even so, many people still have a little trouble learning by themselves, so I think slow buying is a good platform. If you don't have that much energy, you can also choose the book strategy directly on it, so that you can find the right discount information faster and save money at once.