Two students walk past the Hisor Fortress, west of Dushanbe, Tajikistan, on June 12, 2019. Photo: Xinhua

People visit the Hisor Fortress, west of Dushanbe, Tajikistan, on June 12, 2019. Photo: Xinhua

People visit the Hisor Fortress, west of Dushanbe, Tajikistan, on June 12, 2019. Photo: Xinhua

People visit the Hisor Fortress, west of Dushanbe, Tajikistan, on June 12, 2019. Photo: Xinhua

Photo taken on June 12, 2019 shows the Hisor Fortress, west of Dushanbe, Tajikistan. Photo: Xinhua

Photo taken on June 12, 2019 shows the Hisor Fortress, west of Dushanbe, Tajikistan. Photo: Xinhua

Photo taken on June 12, 2019 shows the Hisor Fortress, west of Dushanbe, Tajikistan. Photo: Xinhua

Photo taken on June 12, 2019 shows the Hisor Fortress, west of Dushanbe, Tajikistan. Photo: Xinhua