Kim was authorized by Choi Yong Sul to use Choi's own name ("Yong Sul") as the name of his kwan (Yong Sul Kwan ()). Hapkiyusul members practice the original techniques and learning/teaching process as taught to Kim Yun Sang by Choi.
The passage describes how Kim, under Choi Yong Sul's authorization, established a kwan named "Yong Sul Kwan" using Choi's name. The Hapkiyusul group follows the traditional methods and teaching approach passed down from Kim Yun Sang to Choi.