A visitors looks at an artifact shown at exhibition Gateway to the Silk Road. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)

Gateway to the Silk Road is an exhibition of artifacts that offers visitors a glimpse into the variety ethnic cultures and of archaeological discoveries made in Gansu province, in Northwest China. (Photo by Jiang Dong/China Daily)