The three astronauts of Shenzhou XIV decided how Chen Dong, Liu Yang and Cai were chosen.

Liu Yang and Cai will be selected, which is the result of the astronaut system's comprehensive consideration of various factors in accordance with the principles of overall consideration, old and new collocation and inheritance and development. All three astronauts are excellent. Before this expedition, they must have made extraordinary efforts and received training in various subjects, not only with professional knowledge, but also with some physical and psychological tests. They are excellent. They can come back successfully after going out for half a year.

After layers of selection, the three astronauts were finally able to carry out the Shenzhou 14 manned mission. For astronauts, working in outer space is a very dangerous thing, so it has a great impact on their physiological limit challenges. How Cai was selected for this space flight is actually because of his own strength and achieved excellent results in various assessments, so it is normal to be selected for this Shenzhou 14 spacecraft.

There are too many unsolved mysteries about outer space, so human beings are always eager to go back to outer space in order to understand it. However, if they want to know about outer space, they must collect relevant data, such as the medium in the air, the soil of other planets, the overall shape and appearance of the universe. So the mission of this flight is to collect all kinds of data and send them back to the mainland for space researchers to study.

Chen Dong used to be the captain of the flight brigade of a certain division of the Air Force and was rated as the first-class pilot of the Air Force. Carry out the manned mission of Hangzhou 1 1. Liu Yang used to be the vice captain of the air force's flight brigade, and was rated as the second-class pilot of the air force. Once carried out the Shenzhou-9 manned mission, Cai was the deputy captain of the flight brigade of a training base of the Air Force and was rated as the first-class pilot of the Air Force.

These three astronauts have gone through many selections, many selections, many efforts, and they also need their own willpower and many difficulties to get this opportunity and realize their life value.