People visit a bookstore in Cologne, Germany, on March 8, 2021. Bookstores in Germany were allowed to reopen with hygiene requirements and customer restrictions on Monday. (Photo by Tang Ying/Xinhua)
A staff member pulls up a guardrail at the entrance of a bookstore to limit the number of customers in Cologne, Germany, on March 8, 2021. Bookstores in Germany were allowed to reopen with hygiene requirements and customer restrictions on Monday. (Photo by Tang Ying/Xinhua)
A staff member holds a counter at the entrance of a bookstore to limit the number of customers in Cologne, Germany, on March 8, 2021. Bookstores in Germany were allowed to reopen with hygiene requirements and customer restrictions on Monday. (Photo by Tang Ying/Xinhua)
A plush doll wearing a face mask is seen at a bookstore in Cologne, Germany, on March 8, 2021. Bookstores in Germany were allowed to reopen with hygiene requirements and customer restrictions on Monday. (Photo by Tang Ying/Xinhua)