# Shijian 31 Mission Overview

China successfully launched the Shijian 31 experimental satellite on June 16, 2026, aboard a Long March 3B/E rocket. The mission was conducted by China Aerospace Science and Technology Corporation (CASC) from the Xichang Satellite Launch Center in southwestern China. Official statements describe the satellite as designed for "spatial environment detection," though the classified nature of the payload suggests advanced research objectives that remain undisclosed to international observers.

The Long March 3B/E rocket lifted off at 9:45 AM UTC, delivering its payload to a highly eccentric Molniya-class orbit. This orbital configuration indicates the satellite's intended purpose involves extended coverage over high northern or southern latitudes, a profile commonly associated with communications, reconnaissance, or scientific research missions requiring extended dwell time over specific regions.

The launch marked a successful deployment for CASC's reliable Long March vehicle family. Shijian satellites have historically served as testbeds for experimental technologies, and Shijian 31 continues this tradition. The mission underscores China's ongoing commitment to advancing its space capabilities and expanding its constellation of specialized orbital assets for both scientific and strategic applications.