In my work ‘Blueprint’ I covered the wall with a large piece of white fabric and invited individuals to hammer piles into the fabric, connecting points with threads.
I then applied cyanotype liquid to the fabric and exposed it to sunlight, revealing the marks of people’s intelligence. After removing the fabric, I tried to paint the wall back white. But even after more than 30 attempts, the blue marks persisted and reappeared in the sunlight each day, resisting all efforts to cover them up.
Tong Hua 