People visit the Christmas market on Breitscheidplatz in Berlin， capital of Gremany， on Nov。 22， 2021。 Several Christmas markets in Berlin opened on Monday under strict hygiene regulations。 （Photo by Stefan Zeitz/Xinhua）
People visit the Christmas market on the Gendarmenmarkt square in Berlin， capital of Gremany， on Nov。 22， 2021。 Several Christmas markets in Berlin opened on Monday under strict hygiene regulations。 （Photo by Stefan Zeitz/Xinhua）
People visit the Christmas market on Breitscheidplatz in Berlin， capital of Gremany， on Nov。 22， 2021。 Several Christmas markets in Berlin opened on Monday under strict hygiene regulations。 （Photo by Stefan Zeitz/Xinhua）
A woman with a face mask visits the Christmas Market in Frankfurt， Germany， Nov。 22， 2021。 The Frankfurt Christmas Market opened here on Monday with strict control and prevention measures against COVID-19。 （Xinhua/Lu Yang）
People with face masks visit the Christmas Market in Frankfurt， Germany， Nov。 22， 2021。 The Frankfurt Christmas Market opened here on Monday with strict control and prevention measures against COVID-19。 （Xinhua/Lu Yang）
