ISO 2022-CN
From Just Solve the File Format Problem
ISO 2022-CN is a Chinese encoding that is one of the ISO 2022 encodings. It is ASCII with some escape sequences that switch into different character sets. This includes GB 2312 and planes 1 and 2 of CNS 11643. The variant ISO 2022-CN-EXT adds planes 3 through 7 as well as ISO-IR-165.