Is Korean Air difficult to test?

Korean air is difficult to test. Korean Air recruits graduates with college degree or above and CET-4 or above, and those who can speak Korean are preferred. The height is not less than 164CM, and the corrected visual acuity c is above 0.5. The first test is English self-introduction, the second test is oral English of 1, followed by comprehensive interview, English self-introduction and one-on-one questions from judges. The whole course is not simple English.