Were they meant to be deaf? Or is it a Deaf Culture Society that made the event?
This organization is a society that helps the disabled in China. As you saw from the introduction, many are blind, deaf, no arms, etc... and what this society does is it shows us that even the disabled can achieve greatness in the performance of arts.
Those young people walking with sticks were practicing their walk because they are blind and you can see the transformation of what they were doing when walking on stage.
We all seem to complain about the ups and downs of the markets around the world, and yet we forget how lucky we are to just be able to have Sight, Hearing, Taste, Smell and Touch.