This is the Wahnam version of the 24 Peking Set. Grandmaster Wong added two patterns, a "Shoulder Strike" and "Elbow Strike" so that this set contains all the 13 fundamental techniques of Taijiquan. This is not taught in our basic syllabus but might be chosen as a selective set by students who have learned the fundamentals.
This Wudang Taijiquan set was reconstructed by Grandmaster Wong Kiew Kit from classical sources. It was reputed to be practiced in the 13th century by the great Zhang San Feng who integrated kungfu, negong and meditation into one unity, shaolin.org/video-clips-7/wudang-taijiquan/set-videos.html