An old-timer car is seen during a traditional car parade of Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

An old-timer car is seen during a traditional car parade of Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

Old-timer cars are seen during a traditional car parade of Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

An old-timer car is seen during a traditional car parade of Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

A painter draws during Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

A painter draws during Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

Visitors view an old-timer car during Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)

An old-timer bus is seen during the traditional car parade of Riga Retro 2019 in Riga, Latvia, on Aug. 17, 2019. The annual old-timer meeting Riga Retro 2019 organized by Antique Automobile Club of Latvia and Riga Motor Museum kicked off here on Saturday. More than 100 antique vehicles of different periods of time and styles took part in the event. (Photo by Janis/Xinhua)