Photo taken on Dec. 10, 2018 shows the ship Shen Kuo arrives at the Challenger Deep, the lowest point of the Mariana Trench. A research team, composed of staff from Shanghai Ocean University and West Lake University, completed two sea trials of second-generation lander "Rainbow Fish" in the Mariana Trench on Dec. 11, 2018. Rainbow Fish dived to 10,918 meters and 10,899 meters respectively. (Photo/Xinhua)
Photo taken on Dec. 10, 2018 shows researchers put the second generation lander of the "Rainbow Fish" into the water. A research team, composed of member staff from Shanghai Ocean University and West Lake University, completes twice sea trials of the second generation lander of the "Rainbow Fish" in the Mariana Trench, Dec. 11. 2018. "Rainbow Fish" dived into 10,918 meters and 10,899 meters respectively. (Photo/Xinhua)
Photo taken on Dec. 10, 2018 shows researchers put the second generation lander of the "Rainbow Fish" into the water. A research team, composed of member staff from Shanghai Ocean University and West Lake University, completes twice sea trials of the second generation lander of the "Rainbow Fish" in the Mariana Trench, Dec. 11. 2018. "Rainbow Fish" dived into 10,918 meters and 10,899 meters respectively. (Photo/Xinhua)