I have been preparing my own wenxin keli . I researched it heavily starting 5 years ago and after 2 bouts of flu in one season threw me into continuous afib. I have had complete success so far. I take the mixture in a powder that i prepare from the roots, add .5 tsp per each cup of hot, not boiling, water and drink it throughout the day.I total 3 cups. Polyganatum root, codonopsis root, spikenarby Eve62 - AFIBBERS FORUM