13, the account of Xueba Library recommended by seniors was tried out, and the overall feeling was good. At first, I was worried that I wouldn't need to buy it for three months, and I bought it several times in half a year. Until 15, I simply bought it permanently, 30,000 days, more than 80 years. It has been used for more than five years since 13, and there is no problem. Usually it will be maintained within 20 hours after leaving a message. The used website Xueba Library is very responsible and worth recommending. So far, I have seen Xueba really getting better and better. The only good thing now is that it provides cloud download, which provides too much convenience for busy me. I just want to say that those friends who say that Xueba is a liar are really lying and framing. Now I want to reply that they are colleagues. . . . .