A citizen lays flowers at the Piskaryovskoye Memorial Cemetery in St. Petersburg, Russia, Jan. 27, 2021. Activities were held here to mark the 77th anniversary of ending the Nazi siege of Leningrad during World War II. Leningrad was besieged by the Nazi troops on Sept. 8, 1941 and the siege was lifted on Jan. 27, 1944. (Photo by Irina Motina/Xinhua)

An elder pays tribute to victims at the Piskaryovskoye Memorial Cemetery in St. Petersburg, Russia, Jan. 27, 2021. Activities were held here to mark the 77th anniversary of ending the Nazi siege of Leningrad during World War II. Leningrad was besieged by the Nazi troops on Sept. 8, 1941 and the siege was lifted on Jan. 27, 1944. (Photo by Irina Motina/Xinhua)

A ceremony to mark the 77th anniversary of ending the Nazi siege of Leningrad during World War II is held at the Piskaryovskoye Memorial Cemetery in St. Petersburg, Russia, Jan. 27, 2021. Activities were held here to mark the 77th anniversary of ending the Nazi siege of Leningrad during World War II. Leningrad was besieged by the Nazi troops on Sept. 8, 1941 and the siege was lifted on Jan. 27, 1944. (Photo by Irina Motina/Xinhua)

Soldiers lay flowers at the Piskaryovskoye Memorial Cemetery in St. Petersburg, Russia, Jan. 27, 2021. Activities were held here to mark the 77th anniversary of ending the Nazi siege of Leningrad during World War II. Leningrad was besieged by the Nazi troops on Sept. 8, 1941 and the siege was lifted on Jan. 27, 1944. (Photo by Irina Motina/Xinhua)