China's national flag flies at half-mast at Wusi square in Qingdao, east China's Shandong Province, 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 the country's southwestern regions on May 12.

China's national flag flies at half-mast at a square in the headquarters of the Hong Kong Special Administrative Region government, 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.