A girl holding a ballon walks past the Eiffel Tower lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. Most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)

The Eiffel Tower is lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. The most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)

The Notre Dame cathedral is lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. The most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)

The Arc de Triomphe is lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. The most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)

The Eiffel Tower is lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. The most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)

The Arc de Triomphe is lit up in blue to celebrate the start of the French presidency of the European Union in Paris, France, Jan. 1, 2022. The most emblematic landmarks in France turned blue Saturday night to mark French presidency of the EU. (Photo: Xinhua)