In April 79 I was in China on business and taken by my hosts to see the Great Wall. It was very hot so I took off my jacket and my white shirt was very conspicuous among the (in those days) sea of grey suits. I was walking down a slope and could see a similar sole white shirt among the grey coming in the opposite direction about 100 yds ahead. I soon realised it was John Cunningham who I had not seen since 1975. I put my jacket back on and keeping as low as possible waited until he was alongside me and quietly said “Hello John how are you?” He had not seen me approaching and was turned to stone in mid stride. Eventually he managed five words “What are you doing here”