In response to the UFO sightings over Hong Kong, Wang Sichao, a planetary astronomer from the Purple Hills Observatory under the Chinese Academy of Science (CAS), confirmed after one week of analysis that the UFO sightings were "ghost images" as a result of the reflection on camera lenses from the intense light emitted by outdoor circular lamps. The outdoor circular lamps are symmetrical to the video image center.
According to Radio Television Hong Kong, within one hour after midnight on Sept. 9, the Hong Kong Observatory received several reports about UFO sightings at the Tai Lam Tunnel, Wan Chai, Happy Valley and other areas amid thunderstorms. The videos and pictures taken by witnesses show that the UFOs are plate-shaped, and several luminous circles formed a large circle. They were constantly moving amid flashes of lightning.