Answer : 3. "Mengxiang"
Explanation :

China has introduced a revolutionary new ocean drilling ship called 'Mengxiang', which is designed to penetrate the Earth's crust and reach the mantle for the first time in human history. If successful, Mengxiang's planned drilling to breach the Mohorovicic Discontinuity (Moho) 7,000 meters below sea level will open the door to unprecedented scientific exploration and discovery within the planet. Designed through collaboration between the Geological Survey of China and more than 150 institutions, Mengxiang is a huge, specially equipped ship capable of withstanding extreme conditions.