Something unusual was happening on the quiet, clear night in Hangzhou, Zhejiang Province, on July 7 this year. Because of sightings of an Unidentified Flying Object (UFO), more than 20 flights were postponed for 56 minutes at the city's Xiaoshan International Airport. Immediately the event was connected with alien spacecraft. Speculations and rumors were everywhere.

On July 14, a joint investigation group of experts from the Beijing UFO Research Society (BURS) and Shanghai UFO Research Center arrived in Hangzhou. They visited the airport and interviewed witnesses to collect as much information as possible.

On July 25, the group released its preliminary findings: There was no evidence the sightings were connected to alien spacecraft. But the possibility that the event had been caused by private or military aircraft activities could not be ruled out.

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