How many different versions of the Ba Duan Jin (Eight Pieces of Silk Brocade) Qigong are there? I thought there would be one unique sequence, but today I restarted a practice with the sequence below, from the YouTube video by Judy Young at

I am going to try to compile a set of lists of what I think are different versions of the Ba Duan Jin. I remember each of these exercises, except for the last, which makes me think there are a number of different versions. Does anyone out there have any experience in this or anything to contribute? Thanks.