Photo taken on April 11, 2019 shows the panda shop of the Panda House in Copenhagen Zoo, Denmark. Danish Queen Margrethe II officially opened the Panda House at Copenhagen Zoo on Wednesday. Male Xing Er, a 5-year-old, and female Mao Er, a 4-year-old, left the southwestern Chinese city of Chengdu on April 4 and headed to their new home at Copenhagen Zoo. (Xinhua/Guo Chen)