A three-day #WinterOlympics special virtual event was held in #Zhangjiakou, the co-host city of the #Beijing2022 Winter Olympics. The event highlighted the beauty of the Beijing-Zhangjiakou high-speed rail line. #BeijingVanguards https://t.co/s1qgf6Np1rA three-day #WinterOlympics special virtual event was held in #Zhangjiakou, the co-host city of the #Beijing2022 Winter Olympics. The event highlighted the beauty of the 3169818 A three-day #WinterOlympics special virtual event