Seems Like Someone Copied My Book?

Just now, a kind book friend reminded me that a book called "Douluo: Heavenly Dream Ice Silkworm" plagiarized this book. I went to read it, and it seems that he copied all the first twenty-five chapters of mine. I haven't changed it, I don't know what he means, but even if it's a book friend, it's not appropriate, right?

Let me just say it here, don’t everyone treat me as a pirated version, I’ll go to his comment area and ask him what he means, that’s all