Chinese Mountain Cat (Felis bieti) must be one of the most poorly known cats in the world. With a very small known range on the northeastern Tibetan Plateau (Qinghai and northwest Sichuan), it is the only cat endemic to China and it was as recently as 2007 that it was first photographed in the wild (via a camera trap).
Chinese Mountain Cat is so poorly known that a young Chinese scientist who wanted to study it for his PhD was told by his supervisor that there simply wasn’t enough information to warrant a PhD and to focus on another mammal. In recent years there have been sporadic sightings in Rouergai (Sichuan Province) and near Yushu (Qinghai Province) but it remains one of the most mysterious felids on the planet.
https://birdingbeijing.com/2018/10/12/chinese-mountain-cat/