This photo taken on Oct. 20, 2024 shows a city view of Kazan, Russia. Kazan is the capital city of Russia's Republic of Tatarstan. (Xinhua/Bai Xueqi)

　　This photo taken on Sept. 25, 2024 shows a city view of Kazan, Russia. Kazan is the capital city of Russia's Republic of Tatarstan. (Xinhua/Cao Yang)

　　This photo taken on Oct. 19, 2024 shows a city view of Kazan, Russia. Kazan is the capital city of Russia's Republic of Tatarstan. (Xinhua/Cao Yang)

　　This photo taken on Sept. 23, 2024 shows the scenery near the Kazan Kremlin in Kazan, Russia. Kazan is the capital city of Russia's Republic of Tatarstan. (Xinhua/Cao Yang)

　　This photo taken on Oct. 20, 2024 shows a city view of Kazan, Russia. Kazan is the capital city of Russia's Republic of Tatarstan. (Xinhua/Cao Yang)