A staff member gives sanitizing gel to a customer at a store in Lille, northern France, Dec. 22, 2021. (Photo: Xinhua)

A woman shops at the Christmas market in Lille, northern France, Dec. 22, 2021.(Photo: Xinhua)

A woman carrying shopping bags walks on the street in Lille, northern France, Dec. 22, 2021.(Photo: Xinhua)

The Christmas market is seen in Lille, northern France, Dec. 22, 2021.(Photo: Xinhua)