1On July 6th, 969, Armstrong flew to the moon with Aldrin Jr. and Collins in Apollo 1 1 spaceship. Four days later, at 4: 00 pm EST18, he manually controlled the "Eagle" lunar module to land in a flat area near the southwest edge of the Quiet Sea. On the afternoon of July 2 1 Sunday 10: 56 EST, flight commander Armstrong climbed out of the airlock of the lunar module and stayed on the 5-meter-high entrance platform for a few minutes to calm his excitement. Then he stretched out his left foot and walked slowly to the surface of the moon along an escalator on the lander of the lunar module. He stopped briefly at every step of the escalator to adapt his body to the gravity environment of the moon. It took 3 minutes to walk the 9-level escalator. At 4: 07, he carefully touched his left foot on the moon, and then he got up the courage to stand his right foot on the moon. So for the first time, human footprints were printed on the desolate and silent land of the moon. At that time, he said a famous saying that was often quoted on countless occasions: "This is a small step for individuals, but it is a big step for mankind."