According to Xinhua news agency and others, some lunar samples collected by chang'e-5 were officially handed over. The lunar samples weighed 1731g. This also marks the beginning of China's first work on the storage, analysis and research of extraterrestrial objects, and the chang'e-5 mission has shifted from engineering implementation to scientific research.

The lunar samples brought back by chang'e-5 will be used for three purposes: first, scientific research; second, it will be displayed in the National Museum of Tibet for popular science education; third, according to international cooperation conventions and multilateral bilateral cooperation agreements, the lunar samples and data management measures will be shared with relevant scientists, and some samples may be sent as state gifts according to international practices.

There are many important roles in the study of lunar samples. It is of great significance to study the lunar surface interaction and lunar soil texture. The lunar sample stock is only 1731g, and part of the Lunar Sample for research purposes is unknown.
According to Zou Yongliao, director of the General Department of lunar and deep space exploration of the Chinese Academy of Sciences, it is of great significance to study the composition characteristics (rock type, mineral composition, chemical composition, etc.) of the sampling area, the interaction between lunar surface materials and solar wind, and the pedogenic mechanism of lunar soil.
In addition, according to the actual composition characteristics, if the collected samples are or produced from ancient plagioclase materials, it is also of great scientific value for the study of the early history of the moon; if the collected samples have or come from the basalt of the moon sea, it is of great value to the study of the lunar volcanism and even the thermal history; if the collected samples have the composition of impact breccia, they are of great scientific value to the study of the early history of the moon It is of great value to study the impact effect of the ball.

According to CCTV news and the latest news from NASA, chang'e-5 has successfully entered the lunar earth transfer orbit. In the future, the chang'e-5 orbiter and the reentrant combination carrying lunar samples will carry out intermediate orbit correction during the lunar earth transfer process, and select an opportunity to separate the orbiter and the reentrant, and return to earth according to the plan.

The second lunar earth transfer incident was carried out for the combination of chang'e-5 orbiter and reentrant. Four 150 n engines were successfully ignited at about 230 km from the lunar surface. The engines were shut down normally after about 22 minutes. According to the real-time telemetry data monitoring, the combination of the orbiter and the reentrant has successfully entered the lunar earth transfer orbit.

At 9:54 on December 12, the combination of chang'e-5 orbiter and reentry vehicle experienced a six-day waiting around the moon. The first lunar earth transfer incident was implemented, and the orbit was changed from a nearly circular orbit to an elliptical orbit with a height of about 200 km.