ZHUHAI-1 03A, also known as Xihaian 1, is an Earth observation satellite launched on September 19, 2019, from the Jiuquan Satellite Launch Center (JSC) using a Chang Zheng 11 launch vehicle. Operated by ZHUORB and manufactured by HARB, it has a bus designation of OHS-1 and carries an OHS-3A payload equipped with a video imager for Earth observation tasks. The satellite measures 0.5 meters in length, 0.4 meters in diameter, and spans 1 meter with its deployable fixed solar arrays and batteries providing power. It has a dry mass of 69 kilograms, identical to its launch mass. Its shape is described as box-like, but specific details regarding its attitude control system (ADCS), radar cross-section (RCS), visual magnitude (VMAG), and material composition are not provided.