The Notre Dame de la Garde Basilica is seen from the old port in Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 5, 2021 shows the old port of Marseille, France. (Xinhua/Gao Jing)

A bicyclist passes by the old port of Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

The If Island is seen from the Notre Dame de la Garde Basilica in Marseille, France, Sept. 3, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 4, 2021 shows part of the city view of Marseille, France. (Xinhua/Gao Jing)

People enjoy themselves on the seaside reef in Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 5, 2021 shows Marseille Cathedral, or Cathedral of La Major, in Marseille, France. (Xinhua/Gao Jing)

A nun reads a book near the Notre Dame de la Garde Basilica in Marseille, France, Sept. 3, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 5, 2021 shows the old port of Marseille, France. (Xinhua/Gao Jing)

A tourist takes the city's sightseeing train at the old port of Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

A tourist cruise ship is seen from the Pharo Palace in Marseille, France, Sept. 5, 2021. (Xinhua/Gao Jing)

A monument in memory of the missing in the sea is seen near the Notre Dame de la Garde Basilica in Marseille, France, Sept. 3, 2021. (Xinhua/Gao Jing)

People enjoy themselves at a bar on the seaside reef in Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

A boat sails away from the old port of Marseille, France, Sept. 5, 2021. (Xinhua/Gao Jing)

A person takes photos in Marseille, France, on Sept. 5, 2021. (Xinhua/Gao Jing)

A couple look at the If Island from the Notre Dame de la Garde Basilica in Marseille, France, Sept. 3, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 4, 2021 shows the old port of Marseille, France. (Xinhua/Gao Jing)

A woman walks her dog in front of the City Hall in Marseille, France, Sept. 4, 2021. (Xinhua/Gao Jing)

Photo taken on Sept. 4, 2021 shows part of the city view of Marseille, France. (Xinhua/Gao Jing)