The answer is as can be seen in the picture - he is flying a kite! Like other Beijingers he has learnt to enjoy the simple pleasures of life (more photos below).

The younger generation prefer to spend their leisure hours at a karaoke bar singing among friends...

...while the elderly prefer playing cards like people all over the world.

The women form dance groups or practise tai chi chuan in public squares to while away their free time.

Mahjong is still as popular as ever among the Chinese and not only the men, but also the women, indulge wholeheartedly in it.