The Game

The shuttlecock, called a jianzi in the Chinese game and also known in English as a 'Chinese hacky sack' or 'kinja', typically has four feathers fixed into a rubber sole or plastic discs. Some handmade jianzis make use of a washer or a coin with a hole in the centre.

Competitively, the game is played on a rectangular court 6.10 by 11.88 metres, divided by a net (much like badminton) at a height of 1.60 metres (1.50 metres for women).

There are unlimited variations of the game, such as trying to keep the shuttlecock in the air until an agreed target of kicks (eg. 100) is reached, either alone or in a pair. In circle play, the aim may be simply to keep play going. In all but the most competitive formats, a skillful display is a key component of play.

How to Play

During play, various parts of the body, but not the hands, are used to keep the shuttlecock from touching the ground. It is primarily balanced and propelled upwards using parts of the leg, especially the feet. Skilled players may employ powerful and spectacular overhead kicks. The informal game

Reference: http://en.wikipedia.org/wiki/Jianzi