Mongolian ping pong

In the movie Mongolian Ping Pong a young boy discovers a ping pong ball floating down the river while getting water for his family. At first he thinks it is a glowing pearl, and that it came from the spirits. He shows everyone what he has found and they all think it a pearl too or they don't know what it is. Except for his grandmother, who tells him it is a gift from the heavens and that the individual who finds it will have good fortune. When he finds out it is ping pong ball and that it is a national ball, he tries to figure out what ping pong is. In the end he walks into a room full of ping pong players.