People enjoy a concert by Beethoven Orchestra Bonn on the lawn at a park in Bonn, Germany, on June 28, 2020. The concert was held here on Sunday to commemorate the anniversary year of the 250th birthday of composer and pianist Ludwig van Beethoven. Picnic blankets were delivered to the audience by the event organizers to remind them of keeping a physical distance amid the COVID-19 concerns. (Photo by Tang Ying/Xinhua)