In between their performances, there is footage of busy urbanites walking and rushing through the city streets. There is a contrast between the metropolis hustle and bustle and the two artists keeping themselves indulged in their own creations.

Zhang says in the chemistry arising from his and Yu's bodily movements lies the key to the truth of life.

Zhang's concerns with people's individual experiences and state of mind have kept driving him to push forward the frontier of ink painting, which is being demonstrated at his exhibition, Ink Whispers, running through to Sunday at the gallery of the art portal, Calligraphy and Painting Channel, inside the Beijing Olympic Forest Park.