A woman watches the performance during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend. (Photos: Xinhua)

Artists perform during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

Artists perform during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

Artists perform during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

A boy poses for a photo during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019 Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

A woman takes a selfie with flower decorations during the Moscow City Day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

An artist performs during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

An artist performs during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

An artist performs during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

A boy plays with a toy crane during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

People pass through Tverskaya street during the Moscow City Day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

Children play in the VDNKh amusement park during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.

People pass through Tverskaya street during the Moscow City day event celebrations in Moscow, Russia, on Sept. 7, 2019. Moscow celebrated its 872nd anniversary to honor the city's founding this weekend.