### 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 supplied by the publishing house, and formal electronic invoices are issued. If you have any questions, please feel free 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!
