Service people of a restaurant wait for customers in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

People dine in a restaurant in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

An artist draws a picture at Place du Tertre in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

An artist performs before a church in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

People dine in a restaurant in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

A man walks past a souvenir shop in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

Photo shows a view of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)

People visit a souvenir shop in Montmartre of Paris, France, Aug. 14, 2019. Located in the north of Paris, Montmartre is famous for its beautiful scenery, unique architecture and rich artistic atmosphere. (Xinhua/Gao Jing)