I do think I paid a price as an artist, and I am trying to make up for it now - I work six days a week in the studio, and I've never been happier.

At the Summer Exhibition, I didn't really change anything; it's the same exhibition. All I changed is the presentation. I didn't really change the rules.

It's just that some things more important for this and less important for that, and this is true regardless the style of the art.

In the studio, it took me a long time to work out how to make paintings that had the intensity that I was able to create by painting whole rooms. There is a very limited number of colours but there are many variations. I decided to use the purest palette that I could.

I had my exhibition of paintings first in Shanghai, and then recently in Wuhan. Wuhan particularly interested me, because I am 1/8 Chinese.

I decided I should use the most obvious colours - the basic colours with simple names: red, purple, yellow, pink. I don't distort the objects, I don't change the objects, I draw them exactly as they are. I do the opposite with the colours.

In the late 70's I started to make drawings of the ordinary objects I had been using in my work. Initially I wanted them to be ready-made drawings of the kind of common objects I had always used in my work. I was surprised to discover I couldn't find the simple, neutral drawings I had assumed existed, so I started to make them myself.