China: sinkhole that hosts ancient forest, 130m tall trees found- here's why scientists are excited

In China’s Guangxi region, explorers have unearthed a forest hiding, prospering, and growing at the bottom of a sinkhole with trees ranging up to 130 meters tall.  
 
The ancient forest that could throw light on some new species of flora and fauna has been found in a massive sinkhole in that extends up to 630 feet deep and spans more than 176 million cubic feet. 

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The Guangxi site is famous for sinkholes in Southern China and among the 30, it is the largest. The site reportedly had three caves in its walls and a well-preserved primitive forest at the bottom. 

Chen Lixin, who led the expedition team said he wouldn’t be surprised to know that there are species found in these caves that have never been reported or described by science until now. 
 
The expedition used the single rope technique for caves to rappel along with the caves and discovered dense plants and trees as they descended vertically for 100 meters.

The team reached the bottom of the pit which was characterised by tropical rainforest with the trees stretching upward desperately, growing tall and thin, showing a "slim" appearance. 
 
According to a report in the Guangxi Daily newspaper, the sinkhole is dangerous, strange, steep, and beautiful.