I was actually thinking of Chinese mining in Afghanistan[1], but couldn't remember all the context. In searching before posting to make sure I wasn't incorrect, I did run across reports of China destroying Tibetan monasteries.[2][3] That said, from looking a bit closer at the articles now, it looks more like China's continued attack on the religion, and not the artifacts themselves, since it's targeting homes next to a monastery (which happen to house people who work at the monastery, if the reporting is to be interpreted correctly, which isn't easy on this topic because it appears reporters are trying to strongly imply something without saying it, which is a red flag).
1: https://www.theatlantic.com/international/archive/2011/07/ho...
2: http://www.bbc.com/news/world-asia-china-36863888
3: https://www.nytimes.com/2016/07/28/world/asia/china-tibet-la...