An aerial drone photo taken on March 5, 2026 shows the research ship Tansuo-1 at the port of Valparaiso, Chile. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Photo by Victor Garate/Xinhua)

This photo taken on March 5, 2026 shows the deep-sea manned submersible Fendouzhe onbroad the research ship Tansuo-1 at the port of Valparaiso, Chile. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Photo by Jorge Villegas/Xinhua)

Du Mengran, co-chief scientist of the joint research expedition, speaks during a closing reception of the Joint China-Chile Atacama Trench Expedition onboard the research vessel Tansuo-1 at the port of Valparaiso, Chile, March 5, 2026. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Xinhua/Zhou Jiayi)

This photo taken on March 5, 2026 shows the research ship Tansuo-1 at the port of Valparaiso, Chile. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Xinhua/Zhou Jiayi)

A visitor takes photos of the deep-sea manned submersible Fendouzhe onbroad the research ship Tansuo-1 at the port of Valparaiso, Chile, on March 5, 2026. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Photo by Jorge Villegas/Xinhua)

People look at the deep-sea manned submersible Fendouzhe onbroad the research ship Tansuo-1 at the port of Valparaiso, Chile, March 5, 2026. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Xinhua/Zhou Jiayi)

This photo taken on March 5, 2026 shows the deep-sea manned submersible Fendouzhe onbroad the research ship Tansuo-1 at the port of Valparaiso, Chile. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Xinhua/Zhou Jiayi)

People look at the deep-sea manned submersible Fendouzhe onbroad the research ship Tansuo-1 at the port of Valparaiso, Chile, March 5, 2026. The closing reception of the Joint China-Chile Atacama Trench Expedition was held here on Thursday. (Photo by Jorge Villegas/Xinhua)