1. Offline purchase: You can go to a large local bookstore or Xinhua Bookstore to buy "Lake Mourn". Look for books with different versions and papers in the bookstore, browse the sample books in person, and then choose the version that suits you.
2. Purchase through a publisher: If you need to purchase a signed version or a specific version of Mourning Lake, you can contact a publisher in Liu Pengcheng or purchase it through relevant channels.