What is "langzhou"

Langzhou or Lang Prefecture may refer to:

• Langzhou , a former prefecture in roughly modern Qujing, Yunnan, China
• Langzhou , a former prefecture in roughly modern Zunyi, Guizhou, China
• Langzhou , a former prefecture in roughly modern Langzhong, Sichuan, China
• Langzhou , a former prefecture in roughly modern Changde, Hunan, China