I learnd The post-the ball-the water from hand to hand & to use it to heal.Ive seen it used to stop people at a distance.There is a book out how to get it -store it-use it.I have used it & good results.2 of these I have met.Freindly & eagor to show you the art.They have a book out with great details of chi useage-storage-ect.I was wondering if any 1 ever got to the point to heal or able to use it for stopping attackers with Kong jin or Fa jing?SanFrancisco Park is great for early moring Tai chi players.Here is a great spot for all kinds of info-history-arts & meeting linage people.