1, Kindle Store: This is an e-book platform operated by Amazon, which provides a large number of book purchase and rental services.

2.AppleiBooks: This is an e-book platform provided by Apple. At present, it is mainly for users of Apple devices, providing tens of millions of digital books for downloading and reading.

3.GooglePlayBooks: This is an e-book platform provided by Google, which has the characteristics of cross-platform and online storage, allowing users to read their books anytime and anywhere.

4. Xiaomi Reading: This is an e-book reader and e-book platform launched by Xiaomi, which provides a large number of free and paid book resources, and also provides special services such as signed books by famous writers.