Hi, I can give you a bit of information about the discovery of the Mawangdui 馬王堆 scrolls which were unearth in in November and December 1973 according to Harper (2009). He doesn't speak of any foreigners present there, and he speaks of archaeological excvation reports of the tombs ((Hunan sheng bowuguan and Zhongguo kexueyuan kaogu yanjiusuo 1973) - but Harper doesn't say whether this were a discussion of the methods of excavating or a description of what was present in the tomb.

Now, I can only speak on the aspect of Chinese medicine, but the scrolls that were unearthed in this tomb that relate to Chinese medicine actually caused many people to re-think the history of the medicine. Some of the texts talk about the acupuncture channels, and but a earlier and different to those that would become canon in the Lingshu Chapter 10 Channels and Network-Vessels 《靈樞·經脈》. They show a lot of similarities, but instead of 12 channels there were only 11, and they were often called different names and used some different nomenclature.

I can only speak at this specific instance, but people seemed quite excited about this discovery and the fact that it offered more information on the development of Chinese medicine.

If you're interested, I suggest checking out Early Chinese Medical Literature by Donald Harper, who is arguably the leading expert on the Mawangdui scrolls in the West. If you read Chinese, then Ma Jixing is one of the best.

Quick Edit: Here is some pictures from a more recent excavation, Laoguan Shan http://cdwglj.chengdu.gov.cn/cdwglj/c134544/2020-01/06/content_6d894c8bdfbb40febe78b49a17ad7504.shtml