Visitors wearing face masks to protect against the COVID-19 look at agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

Visitors take pictures of agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

People visit Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

Agricultural machinery is displayed during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

A visitor takes pictures of agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

Visitors wearing face masks to protect against the COVID-19 look at agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

Visitors look at agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)

Visitors wearing face masks to protect against the COVID-19 look at agricultural machinery on display during Agrosalon international agricultural exhibition in Moscow, Russia, Oct. 7, 2020. The exhibition is held every two years in Moscow. (Photo by Alexander Zemlianichenko Jr/Xinhua)