HY-2B (Haiyang-2B) is a Chinese oceanographic satellite developed by the China National Space Administration (CNSA) and the State Oceanic Administration (SOA). Launched in 2014, the satellite is designed to monitor and study the world`s oceans, with a focus on measuring sea surface height, wind speed and direction, and ocean surface temperature. These measurements are critical for understanding ocean dynamics, including the formation and movement of ocean currents, and the transport of heat and salt in the oceans. The data collected by the HY-2B satellite also helps to improve our understanding of the ocean`s role in climate change and provides valuable information for marine resource management and disaster warning systems. The HY-2B satellite continues to play a significant role in advancing China`s capabilities in oceanography and space technology.