Second, you can search the English version of Harry Potter in Amazon.com, and Amazon offers free trial reading. You can see some chapters, and you need to buy all the chapters.
Third, there is a Google library that scans many kinds of books, and they will pay the publishing house, and then you can read them for free. I've read it, but only the readers' comments on Harry Potter have no text, and I still want to buy it.
Fourthly, China pays more and more attention to copyright. Don't expect to find this English version on Baidu. Baidu is becoming more and more strict in copyright control.
Last suggestion: Go to pottermore official website to buy, there is no other way. Of course, someone may help you online.
1, send an email to pottermore official website or the author himself and tell them about your situation. For example, you are a Pottermore fan in China, and you love this series very much, but you can't afford it financially. Let them give you a set. Publishers and authors must be very happy to receive letters from readers in East China, and this is a good marketing story material with low cost, just a set of books.
2. Go to blogger to register a blog and state your own situation and love for this set of books. The purpose is to let people who see this website buy this set of books for you. Westerners like to donate money if they think your situation is really touching.
3. Go to harrypotter's readers' forum abroad, register your account and post. As above, maybe someone will buy you this set of books.
4. It may be a surprise to post this wish on facebook and twitter with Amazon's wishlist function.