A ferry with flags marking the 25th anniversary of Hong Kong's return to the motherland sails at the Victoria Harbour in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

People pass celebratory posters on an overbridge in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Lo Ping Fai/Xinhua]

Celebratory billboards are seen in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Lo Ping Fai/Xinhua]

Photo taken on June 22, 2022 shows a flower parterre marking the 25th anniversary of Hong Kong's return to the motherland in a park in Hong Kong, south China. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Lo Ping Fai/Xinhua]

Photo taken on June 22, 2022 shows a flower parterre marking the 25th anniversary of Hong Kong's return to the motherland in a park in Hong Kong, south China. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Lo Ping Fai/Xinhua]

Celebratory posters are seen in a street in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

Photo taken on June 22, 2022 shows an installation marking the 25th anniversary of Hong Kong's return to the motherland in a park in Hong Kong, south China. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

A celebratory poster is seen in a street in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

A celebratory poster is seen in a street in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

A celebratory poster is seen at a street in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]

A ferry with flags marking the 25th anniversary of Hong Kong's return to the motherland sails at the Victoria Harbour in Hong Kong, south China, June 22, 2022. This year marks the 25th anniversary of Hong Kong's return to the motherland. [Photo by Wang Shen/Xinhua]