Staffers of the Liaison Office of the Central People's Government in the Hong Kong Special Administrative Region watch as China's national flag flies at half-mast in Hong Kong, south China, May 19, 2008. China on Monday begins a three-day national mourning for the tens of thousands of people killed in a powerful earthquake which struck southwest China's Sichuan province on May 12.

China's national flag flies at half-mast after the flag-raising ceremony at a square in Hong Kong, south China, May 19, 2008. China on Monday begins a three-day national mourning for the tens of thousands of people killed in a powerful earthquake which struck southwest China's Sichuan province on May 12.

China's national flag flies at half-mast in front of the building of the Liaison Office of the Central People's Government in the Macao Special Administrative Region in Macao, south China, May 19, 2008. China on Monday begins a three-day national mourning for the tens of thousands of people killed in a powerful earthquake which struck southwest China's Sichuan province on May 12.