My Chinese friends who have lived in Beijing have an immediate reaction to this photograph. Hee-Jae took this of Han and myself. The three of us rested on the ground after our first long day in Beijing. They sang Korean folk-songs. A few people came and looked at us and then left.     It was only till the next day when we saw a large sign engraved in stone in Chinese and English saying that both laying down and singing were "prohibited out of respect" for the many national monuments that are built around the Square, including Mao's Tomb. This law has a greater history, of course.