Falsifying records
Gents, I also have experience with Koreans altering documents after I refused to sign a document with some idiotic comment and quit the job. The man spoke English very poorly and became irate when I did not understand his English and he certainly did not understand ICAO rules. He is a former Air force pilot and Korean Air Captain.
However, I worked with mostly very nice guys in Korea.
Some miserable people can give a great job a really bad taste