There have been a number of instances of a COVID 19-like pneumonia in various parts of China since the SARS outbreak that were related to bats. Chinese miners clearing out bats and bat poo came down with a COVID 19 like pneumonia back in 2012. A similar outbreak was found in a rural Chinese community that appeared to be tied to the seasonal wild mushroom harvest. The mushrooms were often covered in bat poo.
The Chinese have a difficult cultural, environmental and economic relationship with bats. Eating bats is fairly rare "delicacy" in China. But bat guano's use in Chinese traditional medicine is much more common and widespread. There are lots of Chinese people in caves harvesting bat guano even after the outbreak. Also, both rural and urban development in China have been butting up against large bat colonies. Deforestation for agriculture and urbanization in China are also putting people and bats too close for comfort.
So, the Chinese would like to have the narrative out of the COVID 19 outbreak be that it was the result of one market selling bats or Pangolins for consumption by a very small portion of the Chinese population. That is an easy fix for the Chinese. But if the COVID 19 outbreak was the result of bat guano harvesting or the encroachment of people on bat ecosystems, the fix for that is very, very difficult. It would be akin to getting Americans to give up hamburgers to help fight global warming. Chinese medicine has been around for 10,000 years and is still very popular. And development patterns in China are not going to be able to take into account encroachment on wild bat ecosystems without great expense. China does not want to have to confront either narrative and is probably putting their finger on the scale in the published research to try to steer the debate away from much more difficult issues.