Photo taken on Oct. 31, 2009 shows tourists visiting the museum of ancient ruined site of Dingding Gate, the South Gate of the outer city of ancient Luoyang, central China's Henan Province. The Dingding Gate is the city gate that has been in use for the longest time among all ancient capitals in Chinese history. The famous ancient Silk Road, which served as a corridor for trade and cultural exchanges between Asia and Europe dating back to 2,000 years ago, was inscribed on the World Heritage list at Doha, capital of Qatar on Sunday. Jointly submitted by China, Kazakhstan and Kyrgyzstan, the application for adding part of the millennium-old trade route to the UNESCO list was approved by the World Heritage Committee which convened its 38th session in Doha. (Xinhua)