Photo taken on Oct. 22, 2019 shows people visiting Monastiraki flea market in Athens, Greece. (Xinhua/Marios Lolos)

Photo taken on Nov. 7, 2019 shows a view of the Piraeus port in Greece. (Xinhua/Lai Xiangdong)

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. (Xinhua/Marios Lolos)

Tourists visit the Acropolis in Athens, Greece, Nov. 6, 2019. (Xinhua/Lai Xiangdong)

Guards perform the changing of the guard ceremony on Syntagma Square in Athens, Greece, Nov. 7, 2019. (Xinhua/Lai Xiangdong)

Photo taken on Oct. 31, 2019 shows people visiting the Panathenaic Stadium in Athens, Greece. (Xinhua/Marios Lolos)

Photo taken on Nov. 7, 2019 shows a statue of Socrates in Athens, Greece. (Xinhua/Fei Maohua)

Photo taken on Nov. 6, 2019 shows a general view of Athens, Greece. (Xinhua/Fei Maohua)