This method of selecting points using the I Ching, developed by Dr. Chao Chen, uses 20 Hexagrams which have favorable indications. Each channel is assigned a hexagram with each line representing a 5 shu point + the relevant source point. By comparing the channel hexagram with the selected favorable hexagram, and noting the line with different polarity, the resulting points are calculated. To use this method first select the appropriate channel, then select a favoriable hexagram based on the description. The black list of points are the main ones, the grey ones are additional points from the Interior/Exterior paired channel. See Twicken 2006 for more information and additional techniques.