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In September 2009, a video titled "Hong Kong secondary school students openly engaging in sexual activities at the back staircase of the Wong Tai Sin XX Village," "School uniform boy-girl obscene video," and "Back staircase door secondary school students secretly filmed engaging in sexual activities at the back staircase - completely exposed" emerged. The content showed a young couple wearing school uniforms caressing and kissing at the back staircase of a residential building. Their faces were clearly visible, and their bold behavior was captured on camera and uploaded to the Internet, attracting nearly 20,000 views.

According to Hong Kong's Wen Wei Po, Hong Kong teenagers are sexually open, even showing affection in public places. On the 27th, a video suspected to be of middle school students engaging in indecent acts at the back staircase circulated online, with the two kissing as if no one else was around, and the male removing the female's underwear for further caresses.

A social worker pointed out that teenagers' sexual concepts are increasingly liberal without limits, urging them to consider the consequences before engaging in intimate acts with their partners. In response, a police spokesperson stated that the Commercial Crime Bureau's Technology Crime Unit would follow up on the matter.

A video titled "School Uniform Boy-Girl Obscene Short Film" has been circulating on Hong Kong's internet.