First, I'd Like to Say "Sorry"

The author made a very basic mistake and posted the completed chapter to Volume Nine. (ーー;) We'll have to wait for the official adjustment. Readers can find Chapter Fifty-Five—The Necklace—at the end of Volume Nine.

Location: on QQ Reading, it's Chapter 448. On Qidian Reading, each volume's name is listed in the table of contents. Volume Nine is The Burning Crusade. It's at the end of that volume.