### 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: <v>Genuine</v> books, directly provided by the publishing house, issued a regular electronic invoice, have any problems at any time to contact online customer service!

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