More than 1,400 tourists a day are visiting the biggest and best-preserved ancient clay city in the world, a historical site 10 kilometers west of Turpan in Xinjiang Uygur Autonomous Region. (Compiled by Zhang Xinyue)

The ruined city of Jiaohe, also known as Yarkhoto, was constructed in clay more than 2,000 years ago.

The city in the Yarnaz Valley once had enormous military significance and was a vital cultural hub on the ancient Silk Road.

The city in the Yarnaz Valley once had enormous military significance and was a vital cultural hub on the ancient Silk Road.