Existence Existence: Clip 2 Added: Aug 15, 2017 | Duration: 4:23 | Views: 240 Wang Feng's documentary Existence released in 2017. Existence: Clip 1 Added: Aug 15, 2017 | Duration: 2:38 | Views: 251 Wang Feng's documentary Existence released in 2017. Existence Trailer Added: Aug 1, 2017 | Duration: 1:34 | Views: 191 Trailer of Wang Feng's documentary Existence.