IUCN red list assessment
Euonymus duanensis is known from several karst summits of the type locality, with an estimated extent of occurrence of 10 km2. In accordance with the IUCN (2022), the above-mentioned area corresponds to a single location. There are approximately 300-500 individuals counted at this site. The occurrence and the habitat of the new species are subjected to various anthropogenic disturbances. So, the species is assessed as Critically Endangered (CR) under the criteria B1ab(i)+C2a(i).