Thousands were shocked to see the glowing object light up the night sky and change its form various times.
Some feared it was an anti-missile test or an anti-satelite missile.
Others claim it could be a DF41D missile interception test.
The morphing object appeared above western China in cities such as Xinjiang, Qinghai, and Gansu, according to local media.
The UFO was captured on camera by a number of witnesses.
The sightings caused a frenzy on China’s Weibo social media website.
One user wrote: “Don’t panic, it’s only military training.”
A bizarre blue flash was seen soaring high above Los Angeles in November – triggering fears of an alien invasion.