### Chinese: 正版书籍，出版社直供，开具正规的电子发票，有问题随时联系在线客服！
### English: Genuine books are directly supplied by the publishing house, and formal electronic invoices are issued. If you have any problems, please contact online customer service at any time!
### Errors: 

### Improved English: Authentic books directly provided by publishing house, official electronic invoice available, please contact online customer service if you have any question!