For some time ago i saw a video of chen yibing doing his thirty minute wall handstand, but only show a little about his training and i decided to try it. I did my first attempt on november 22 of 2012 and i did 5 minutes and a half and then each week regulary i got an advance of 1 or one and a half minutes, but when i achieved the 18 minutes take me a month to reach the 20 minutes, but finally i did it and i know that it's possible to do thirty minute wall handstand like chen yibing he has an olympic gymnast who train for years and i think that thirty minutes handstand it isn't too much for him.