Chinese tourists walk under the Chinese national flag as it flies at half-mast on Beijing's Tiananmen Square Oct 17, 2012, as a mark of respect for Cambodia's former King Norodom Sihanouk. Sihanouk died in Beijing on Monday at the age of 89, according to local media. [Photo/Agencies]

Workers try to clean up the garbage filling the street at Baishixia community in Bao'an district, Shenzhen, Guangdong province, on Oct 17. Because a landfill was blocked by nearby residents out of environmental concerns, a lot of trash cannot be sent to the landfill and has accumulated on the street since Monday. The district is trying to clean up the garbage. Photo by Chen Yu / for China Daily