A Lost City (2021)

Against the backdrop of the post-social movement in Hong Kong and after China imposed a strict National Security Law to suppress all anti-government activities. A teenage girl looking forward to embarking on a new journey by taking a new class with her best friend finds her plan derailed by the emigration trend of Hong Kong people. When she tries to return a smartphone to her former classmate, she also experiences the damage done by the two years of political turmoil and the transformation of her once familiar city.