A helicopter sent by south China's Hong Kong Special Administrative Region government carries out an anti-epidemic disinfectant spraying drill over Guanghan Airport in Guanghan City, southwest China's Sichuan Province, May 25, 2008. The helicopter is to join the efforts in epidemic prevention in quake-hit areas in Sichuan.

A helicopter sent by south China's Hong Kong Special Administrative Region government carries out an anti-epidemic disinfectant spraying drill over Guanghan Airport in Guanghan City, southwest China's Sichuan Province, May 25, 2008. The helicopter is to join the efforts in epidemic prevention in quake-hit areas in Sichuan.