Photo taken on Oct. 22, 2019 shows people visiting Monastiraki flea market in Athens, Greece. Photo:Xinhua

Photo taken on Oct. 28, 2019 shows a general night view of the Acropolis and the Temple of Olympian Zeus at the front in Athens, Greece. Photo:Xinhua

Photo taken on Oct. 28, 2019 shows a general night view of the Acropolis and the Temple of Olympian Zeus at the front in Athens, Greece. Photo:Xinhua

Guards perform the changing of the guard ceremony on Syntagma Square in Athens, Greece, Nov. 7, 2019. Photo:Xinhua

Photo taken on Nov. 7, 2019 shows a statue of Socrates in Athens, Greece. Photo:Xinhua

Photo taken on Nov. 6, 2019 shows a general view of Athens, Greece. Photo:Xinhua