1, China's lunar exploration is China's independent exploration and observation of the moon, called the Chang 'e Project. Carrying out lunar exploration is an important measure for China to take the first step in deep space exploration. The first moon-orbiting satellite was named Chang 'e-1, and Chang 'e-4 was the backup star of Chang 'e-3.

2. Engineering objective: To obtain the three-dimensional image of the lunar surface. Divide the basic geomorphic structural units of the lunar surface and draw up the outline map of the lunar geology and structure, which will provide reference for the subsequent optimization of soft landing; The distribution characteristics of useful elements content and material types on the lunar surface are analyzed. Detect useful elements on the surface of the moon, and initially draw up the distribution map of each element on the surface of the moon; Detecting lunar soil characteristics; Explore the space environment of the earth and the moon.

3. The three-step strategy of "circling", "falling" and "returning" of the project: "circling", launching China's first lunar exploration satellite, breaking through the flight technology to extraterrestrial celestial bodies, and realizing the lunar exploration satellite's flight around the moon; "Landing", launching a lunar soft landing device, breaking through the landing technology of extraterrestrial bodies and carrying a lunar patrol survey; "Return", launch a lunar soft landing device, and break through the technology of returning to Earth from extraterrestrial objects.

Extended data:

Achievements of Chang 'e III

1. Complete the first geological profile of the moon.

It shows the geological structure characteristics and evolution process 330 meters below the surface of the moon, and finds a brand-new rock-lunar basalt. Through these data, we can understand the evolution history of the moon from its formation to the present.

2. Complete the first astrometry.

Because the moon has no atmosphere, it is equivalent to a "transparent" sphere without clouds, so when looking up at space, it will not be disturbed by clouds. In this way, you can look at any sky.

3. Obtaining the image of the earth plasma layer for the first time.

Another important task of Chang 'e III is to observe the Earth. There are several natural barriers around the earth. The first is the plasma layer, which can extend about 40,000 kilometers beyond the surface of the earth. The world's first extreme ultraviolet camera installed on the lander is the equipment specially used to observe the change of plasma layer.

Baidu encyclopedia-Chang' e project