According to the "Regulations on Military Ranks": Article 17 Officers' ranks shall be promoted according to the following time limits: the time limit for promoting officers' ranks in peacetime: second lieutenant shall be promoted to lieutenant, those who graduated from junior college or above shall be two years, and others shall be three years; Captain promoted to captain, captain promoted to major, major promoted to lieutenant colonel, lieutenant colonel promoted to colonel, colonel promoted to senior colonel, each for 4 years; Promotion to the rank of senior colonel or above is based on the officer's position, ability and political integrity and contribution to national defense construction; So from the second lieutenant to the senior colonel, let's calculate: from small to medium, 2 years; From middle level to high level, 4 years; At least school, 4 years; Major to lieutenant colonel, 4 years; From lieutenant colonel to colonel, 4 years. The total number is 2+4+4+4 = 18, and she is 28 years old, so 10 can take the second lieutenant exam, but it does not rule out that she is a pilot. Once every two years, she didn't collapse when she was about to collapse. She saved the plane and people, and then won the first class. However, it is impossible to upgrade in advance.