### 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: Authorized books, directly supplied by the publishing house, with formal electronic invoices, if you have any questions, please contact online customer service!
### Errors: There is no error in the English translation.

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