What are the codes of domestic airlines?

China International Airlines CA \ x0d \ x0d \ China Southern Airlines CZ \ x0d \ x0d \ China Eastern Airlines Mu \ x0d \ x0d \ China Hainan Airlines Hu \ x0d \ x0d \ China Shandong Airlines SC \ x0d \ China Shenzhen Airlines. China Xiamen Airlines MF \ x0d \ x0d \ China Shanghai Airlines FM \ x0d \ x0d \ China United Airlines KN \ x0d \ x0d \ China Okay Airlines BK \ x0d \ x0d \ China Jixiang Airlines HO \ x0d \ x0d \ China Chengdu Airlines. X0d\\x0d\ China Eastern Airlines Group China Cargo Airlines CK \ \ x0d \ China Hebei Airlines (renamed from Northeast Company) NS\x0d\\x0d\ China Xiang Peng Airlines 8l \ x0d \ x0d \ China Huaxia Airlines G5.