Since October last year, five men linked to a Hong Kong bookstore have disappeared one after another.
China-born Swedish national Gui Minhai was allegedly taken from Thailand. Lui Por, Cheung Chi Ping and Lam Wing Kee disappeared in mainland China, and British citizen Lee Bo was last seen at his Hong Kong warehouse.
The bookstore in question deals in publications critical of Chinese leaders, and before his disappearance, Gui was apparently preparing to publish a new book. Could this be the reason why he went missing?
All five men have since resurfaced in mainland China. But how did they get there? Outraged Hong Kongers and the international community are demanding answers.
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