Why did ancient people put coffins on cliffs?

First of all, I want to popularize some knowledge for everyone. Bo people are the collective name of southwest nationalities in ancient Central Plains. This nation has a long history and its people are brave and good at fighting. They once took part in the famous battle of Mu Ye. However, this nation disappeared for no reason, which is still an unsolved mystery. It is said that because of the war in the late Ming Dynasty, they disappeared in the long river of history in order to avoid the war.

In Yibin, Sichuan, China, besides Wuliangye, there is also a famous tourist attraction called Boren Hanging Coffin, which is a national key cultural relic protection unit. Because of its unique funeral culture and puzzling hanging coffins, it is full of mystery, and some people even call it China's "Millennium Mystery".

In the south of China, we all know that many ethnic groups have the custom of hanging coffins. To be famous, I'm afraid the hanging coffins of Bo people are the most famous. In their custom, it is a unique funeral culture because the higher it is, the more auspicious it is. I wonder today, is it because in the agricultural society, there are many mountainous areas, and their ancestors attached great importance to cultivated land and did not affect it, so there is no such funeral custom?

Here comes the problem again. Ancient science and technology were very underdeveloped, and it was necessary to place hanging coffins weighing hundreds of kilograms or even more on the cliff. It was a test for ancient people, and the workload was huge, and some even stood hundreds of meters above the ground. It is very difficult to dig a hole on the cliff, place a crossbar to support it, and ensure that the feng shui is not bad all year round. However, the hanging coffins they left are the last traces of their lives, just like the Maya disappeared for no reason and left the Mayan pyramids, and there were no descendants at all. It is said that after DNA comparison, no ethnic group in China matches Bo people.