People visit the Dream Island amusement park in Moscow, Russia, on July 18, 2020. The indoor amusement park reopened to the public on Saturday after a temporary closure due to the COVID-19 pandemic. (Photo by Alexander Zemlianichenko Jr/Xinhua)

People wearing face masks enter the Dream Island amusement park in Moscow, Russia, on July 18, 2020. The indoor amusement park reopened to the public on Saturday after a temporary closure due to the COVID-19 pandemic. (Photo by Alexander Zemlianichenko Jr/Xinhua)

An employee wearing a face mask disinfects a facility at the Dream Island amusement park in Moscow, Russia, on July 18, 2020. The indoor amusement park reopened to the public on Saturday after a temporary closure due to the COVID-19 pandemic. (Photo by Alexander Zemlianichenko Jr/Xinhua)

People take a ride on a swing carousel at the Dream Island amusement park in Moscow, Russia, on July 18, 2020. The indoor amusement park reopened to the public on Saturday after a temporary closure due to the COVID-19 pandemic. (Photo by Alexander Zemlianichenko Jr/Xinhua)

An employee wearing a face mask disinfects a facility at the Dream Island amusement park in Moscow, Russia, on July 18, 2020. The indoor amusement park reopened to the public on Saturday after a temporary closure due to the COVID-19 pandemic. (Photo by Alexander Zemlianichenko Jr/Xinhua)