Tourists walk through an alley near the Ruins of St. Paul's in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Du Yu)
Tourists visit the Ruins of St. Paul's in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Du Yu)
China's national flags and flags of China's Macao Special Administrative Region (SAR) are seen along a road in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
Women walk past a restaurant near the Fisherman's Wharf in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Gang)
Women walk on a footbridge with baby strollers near the Macao Science Center in south China's Macao, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Gang)
People visit the Macao Museum in south China's Macao, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Jing)
Photo taken on Dec. 17, 2019 shows the scenery at sunrise in south China's Macao. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Du Yu)
Photo taken on Dec. 17, 2019 shows the night view of Ruins of St. Paul's in Macao, south China. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Yu Dongsheng)
Photo taken on Dec. 17, 2019 shows a view of the Ponte de Amizade (Bridge of Friendship) in south China's Macao. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Du Yu)
A man takes photos at the Fisherman's Wharf in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
A woman wearing a wedding dress poses for photos at the Fisherman's Wharf in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
Freighters sail in the sea near the Ponte de Amizade (Bridge of Friendship) in south China's Macao, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Gang)
Pedestrians are seen in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Chen Duo)
Photo taken on Dec. 18, 2019 shows a view near the Oriental Arch monument in Macao, south China. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Jing)
Tourists visit the Mount Fortress (Fortaleza do Monte) in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
Photo taken on Dec. 18, 2019 shows a street view of Macao, south China, Dec. 18, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Chen Duo)
China's national flags and flags of the Macao Special Administrative Region are seen near the Oriental Arch monument in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
People buy food specialties in an alley near the Ruins of the St. Paul's in Macao, south China, Dec. 16, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Meng Tao)
Tourists visit the Taipa Houses Museum in Macao, south China, Dec. 18, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Cheong Kam Ka)
People pose for photos at the Golden Lotus Square in Macao, south China, Dec. 18, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Li Jing)
China's national flags and flags of the Macao Special Administrative Region are seen near the Oriental Arch monument in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Wang Shen)
A tourist takes photos of an art installation themed on the 20th anniversary of Macao's return to the motherland in Macao, south China, Dec. 18, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Du Yu)
A pedestrian walks in a street in Macao, south China, Dec. 18, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Cheong Kam Ka)
People watch a light show at the Ruins of the St. Paul's in Macao, south China, Dec. 17, 2019. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/An Xiya)
Photo taken on Dec. 18, 2019 shows an art installation themed on the 20th anniversary of Macao's return to the motherland in Macao, south China. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. (Xinhua/Cheong Kam Ka)
