The 21st Lanzhou Investment and Trade Fair was launched in Gansu province on July 6 and will last until July 11.

This year's fair is themed on promoting cooperation among the countries and regions along the Silk Road - an ancient trade route stretching from China through Central Asia and on to Europe.

A series of forums and promotional activities featuring Silk Road aspects were held during the fair, including a Silk Road Cooperation and Development Forum.

Visitors are attracted to a Central Asia booth during the 21st Lanzhou Investment and Trade Fair in Lanzhou, Gansu province, on July 7, 2015. The fair will run until July 11. [Photo/xinhuanet.com]

Various domestic and international products were put on display at the Gansu International Convention and Exhibition Center, the venue of the fair.

More than 400 guests from 46 countries such as Belarus, India and Turkey were invited to join the forums, along with several international organizations.

The ASEAN-China Center booth at the 21st Lanzhou Investment and Trade Fair, held in Lanzhou in Northwest China's Gansu province on July 7, 2015. The fair will conclude on July 11. [Photo/xinhuanet.com]