Aerial photo taken on Aug. 8, 2019 shows the night view of the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists watch a performance at the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists watch a performance at the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists visit the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists watch a float parade at the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists watch a performance at the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)

Tourists watch a performance at the Great Tang All Day Mall in Qujiang New District, Xi'an, northwest China's Shaanxi Province, on Aug.8, 2019. In recent years, Xi'an develops its night tour here by building distinctive blocks, upgrading the lighting system, enriching night activities and so on. (Xinhua/Liu Xiao)