This photo taken on July 14, 2025 shows the Liberty Park and the Presidential Palace in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

This photo taken on July 17, 2025 shows the Mauritanian National Museum in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

An aerial drone photo taken on May 20, 2025 shows the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Si Yuan)

This photo taken on July 14, 2025 shows the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

A man walks on the street in Nouakchott, Mauritania, on July 14, 2025. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

This photo taken on July 17, 2025 shows sand dunes and the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

This photo taken on July 14, 2025 shows a fish market in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

An aerial drone photo taken on June 17, 2025 shows a view of the University of Nouakchott in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Si Yuan)

This photo taken on July 17, 2025 shows the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

Pigeons fly over the Liberty Park in Nouakchott, Mauritania, on July 14, 2025. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

An aerial drone photo taken on June 17, 2025 shows the view of a fishing port in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Si Yuan)

People are seen at a fishing port in Nouakchott, Mauritania, on July 14, 2025. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

This photo taken on July 14, 2025 shows the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

Fishermen are seen at a fishing port in Nouakchott, Mauritania, on July 14, 2025. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

People visit a local market in Nouakchott, Mauritania, on July 16, 2025. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Han Xu)

An aerial drone photo taken on June 17, 2025 shows sand dunes and the cityscape in Nouakchott, Mauritania. Nouakchott, on the edge of the Sahara Desert, is the capital of Mauritania and its political, economic, and cultural center. (Xinhua/Si Yuan)