In 1998, when the Ministry of Land and Resources was conducting a land resources survey in Leye County, Baise Prefecture, Guangxi Zhuang Autonomous Region, China, they discovered a rare geological wonder in the world - the karst funnel group, also known as the Leye Tiankeng Group.

This area is a typical karst landform (i.e. karst landform).

The heavy rainfall provides good conditions for the development of underground caves.

The Leye Tiankeng Group is located in Leye County, Guangxi, China, covering an area of ??about 20 square kilometers.

More than 20 sinkholes have been initially discovered, including Dashiwei, Baidong, Fengyan Cave, and Chuandong.

The "Tiankeng" is surrounded by knife-cut cliffs, forming a huge shaft. At the bottom is hundreds of thousands of square meters of virgin forest that humans have never set foot in, and is connected by an underground river.

There are a large number of precious plant and animal species in the forest.

Its underground virgin forest ranks first in the world in area, second in depth, and third in volume, and has extremely high scientific research value.

The largest Dashiwei tiankeng in the Leye tiankeng group has a vertical depth of 613 meters, a north-south width of 420 meters, and an east-west direction of 600 meters.

Dashiwei Tiankeng (also known as Leye Underground Dragon Palace Tianlongkou) is located in Baiyanjiaotun, Shuibao Village, Tongle Town, Leye County, Guangxi, China.

The first question we face is, how are these sinkholes formed?

Experts believe that this may be due to the long-term erosion of underground rivers that created huge underground cavities and caused large-scale collapse of the surface.

So far, similar sinkholes have been discovered in Russia, Australia, and Papua New Guinea.

In recent years, three sinkholes about 300 meters deep have also been discovered in the Nanchuan area of ??Chongqing.

However, the number and depth of Leye sinkholes is a mystery to be solved by science.

Leye Tiankeng is surrounded by knife-like cliffs, forming a huge shaft.

The bottom of the tiankeng is an extremely rare primeval forest that humans have never set foot in, covering an area of ??dozens of square kilometers. The forest is connected by caves and underground rivers. Experts believe that it is very likely to find some previously thought to be

They are extinct animals, such as cave salamanders, blind fish, etc.

They are two ancient animals that live in underground rivers and have degraded eyesight.

It has only been found in Slovenia.

Can people also find something here?

Some people describe Leye Tiankeng as a paradise of ancient plants and a kingdom of animals.

During an inspection in 1999, someone had already photographed blue stones, square bamboos and many unnamed plants.

Experts believe that during this expedition, it is possible to discover plants from ancient times, such as cynophylla.

They even hope to discover some unknown species of plants and animals.

In addition, aquatic invertebrates, common fish, insects, rats and other rodents are very likely to live in Leye Tiankeng.

Scientists have discovered during past inspections that there are a large number of biological fossils in the areas surrounding the Leye Tiankeng Group.

It is understood that these biological fossils are marine animal fossils from the Permian period.

At the same time, there is also a large relic of human survival in the Paleolithic period in the area surrounding the tiankeng.

This discovery has been listed as one of the top ten archaeological discoveries in the world.

Experts pointed out that the value of this site is comparable to that of the Zhoukoudian human site in Beijing.

During this trip, experts will further evaluate the value of these relics and reveal the living conditions of humans at that time.