Flag-raising ceremony marking 20th anniv. of Macao's return to motherland held in Macao(1/5)

A flag-raising ceremony marking the 20th anniversary of Macao's return to the motherland is held at the Golden Lotus Square in Macao, south China, Dec. 20, 2019. (Xinhua/Li Gang)

A flag-raising ceremony marking the 20th anniversary of Macao's return to the motherland is held at the Golden Lotus Square in Macao, south China, Dec. 20, 2019. (Xinhua/Li Gang)

People pose for group photos after watching the flag-raising ceremony marking the 20th anniversary of Macao's return to the motherland, at the Golden Lotus Square in Macao, south China, Dec. 20, 2019. (Xinhua/Cheong Kam Ka)

A flag-raising ceremony marking the 20th anniversary of Macao's return to the motherland is held at the Golden Lotus Square in Macao, south China, Dec. 20, 2019. (Xinhua/Li Gang)

A flag-raising ceremony marking the 20th anniversary of Macao's return to the motherland is held at the Golden Lotus Square in Macao, south China, Dec. 20, 2019. (Xinhua/Cheong Kam Ka)