TODAY Chinese Singing and Dancing: By school and university students, Hong Kong Coliseum, 4 pm. Free. World in Harmony Music Festival: Association for Celebration of Reunification of Hong Kong with China, Hong Kong Cultural Centre Concert Hall, 8 pm. 2905 1997. The Reunification Cup FIFA All Stars vs AFC Asian All Stars: Hong Kong Football Association, Hong Kong Stadium, 8 pm. 2193 7368.