People ride a vintage bus in Warsaw, Poland, on May 16, 2026. Vintage bus-riding event in Warsaw attracts residents and tourists to experience the history of public transportation. (Photo by Jaap Arriens/Xinhua)

A child smiles while riding a vintage bus in Warsaw, Poland, on May 16, 2026. Vintage bus-riding event in Warsaw attracts residents and tourists to experience the history of public transportation. (Photo by Jaap Arriens/Xinhua)

People ride a vintage bus in Warsaw, Poland, on May 16, 2026. Vintage bus-riding event in Warsaw attracts residents and tourists to experience the history of public transportation. (Photo by Jaap Arriens/Xinhua)

People ride vintage buses in Warsaw, Poland, on May 16, 2026. Vintage bus-riding event in Warsaw attracts residents and tourists to experience the history of public transportation. (Photo by Jaap Arriens/Xinhua)