There is a 515 crazy flip in the activity, the starting point reading client, the lower right corner of the bookshelf and other places can be entered, after entering, find a 'grab' word, click in, and turn the page like a book, you can grab it.

Note that it's not the page of this book, it's the page of the event's '14th Anniversary Greetings', and you have to keep turning the pages like a book.

After experiments, it seems that one number can only grab two red envelopes, not only on the hour, but also at other times. (To be continued.) )