Can you show me the footage? We could use wechat, if that is easier for you. I know in China data transfer is restricted. I have a Chinese friend who can translate, too.
Is it allowed to fly a drone into and around the sinkhole Xiaozhai Tiankeng?
30°45′02″N 109°28′12″E
And if so, where and how can I find someone who can do that for me?