I looked into it.Found out It's adapted from Korean novel.How come the characters have Chi...

Historically, Korea and China shared deep cultural, political, and trade relationships for over a thousand years. Dynasties like the Tang, Yuan, and Ming heavily influenced Korean administrative systems, etiquette, and clothing styles alsoooopo
Koreans used traditional Chinese characters (called Hanja in Korea) as their primary writing system for over a thousand years before the creation of the native Korean alphabet.