(01 of10)
Open Image ModalA woman walks past the Causeway Bay Books store entrance in Hong Kong, China, 02 January 2016. The bookstore specializes in reading material critical of the Chinese Communist Party. Major bookstore shareholder Lee Bo was reported missing by his wife Sophie Choi on 1 January, just weeks after four of his associates disappeared in mysterious circumstances. The disappearance of Lee is the fifth such case related to Causeway Bay Books. Missing person reports were made to police about three other mem \n\n撮影日:2016年01月02日 (credit:EPA=時事)
(02 of10)
Open Image ModalThis photo taken on November 13, 2015 shows a poster of Chinese President Xi Jinping seen in a staircase leading to the currently closed Sage bookstore in the shopping district of Causeway Bay in Hong Kong. A Hong Kong employee of a publishing firm known for producing books critical of the Chinese government has gone missing, his wife said on January 1, 2016, following the earlier apparent disappearance of four colleagues. AFP PHOTO / Philippe Lopez\n \n\n撮影日:2015年11月13日 (credit:EPA=時事)
(03 of10)
Open Image ModalA man walks down the stairs of the closed Causeway Bay Bookstore which are known for gossipy titles about Chinese political scandals and other sensitive issues that are popular with visiting tourists from the mainland in Hong Kong Sunday, Jan. 3, 2016, after the disappearance of Lee Bo, the fifth person associated with publisher Mighty Current to vanish in recent months. Hong Kong pro-democracy lawmakers say they\'ll press the government for answers after a fifth employee of a publisher specializing in books critical of China\'s ruling communists went missing. The Chinese words on the poster featuring a photo of Chinese President Xi Jinping reads \"Xi Jinping collapse\" (AP Photo/Vincent Yu) (credit:ASSOCIATED PRESS)
(04 of10)
Open Image ModalA book cover showing Chinese President Xi Jiping, (L), and former Secretary of the Communist Party\'s Chongqing branch Bo Xilai is displayed in a window of the Causeway Bay Books in Hong Kong, China, 02 January 2016. The bookstore specializes in reading material critical of the Chinese Communist Party. Major bookstore shareholder Lee Bo was reported missing by his wife Sophie Choi on 1 January, just weeks after four of his associates disappeared in mysterious circumstances. The disappearance of L \n\n撮影日:2016年01月02日 (credit:EPA=時事)
(05 of10)
Open Image ModalThis photo taken on November 13, 2015 shows a poster seen in a staircase leading to the currently closed Sage bookstore in the shopping district of Causeway Bay in Hong Kong. A Hong Kong employee of a publishing firm known for producing books critical of the Chinese government has gone missing, his wife said on January 1, 2016, following the earlier apparent disappearance of four colleagues. AFP PHOTO / Philippe Lopez / AFP / PHILIPPE LOPEZ (Photo credit should read PHILIPPE LOPEZ/AFP/Getty Images) (credit:PHILIPPE LOPEZ via Getty Images)
(06 of10)
Open Image ModalA sign for the Causeway Bay Books hangs outside the bookstore in Hong Kong, China, 02 January 2016. The bookstore specializes in reading material critical of the Chinese Communist Party. Major bookstore shareholder Lee Bo was reported missing by his wife Sophie Choi on 1 January, just weeks after four of his associates disappeared in mysterious circumstances. The disappearance of Lee is the fifth such case related to Causeway Bay Books. Missing person reports were made to police about three othe \n\n撮影日:2016年01月02日 (credit:EPA=時事)
(07 of10)
Open Image ModalA \'Closed\' sign hangs on the door of the Causeway Bay Books store in Hong Kong, China, 02 January 2016. The bookstore specializes in reading material critical of the Chinese Communist Party. Major bookstore shareholder Lee Bo was reported missing by his wife Sophie Choi on 1 January, just weeks after four of his associates disappeared in mysterious circumstances. The disappearance of Lee is the fifth such case related to Causeway Bay Books. Missing person reports were made to police about three \n\n撮影日:2016年01月02日 (credit:EPA=時事)
(08 of10)
Open Image ModalA building security guard (L) stands near the entrance to the warehouse of Hong Kong-based publisher Mighty Current in Hong Kong on January 2, 2016. A missing Hong Kong employee from a publisher of books critical of China was \'assisting in an investigation\', his wife said on January 2, as the city\'s deputy leader sought to reassure residents over their safety. AFP PHOTO / ANTHONY WALLACE / AFP / ANTHONY WALLACE (Photo credit should read ANTHONY WALLACE/AFP/Getty Images) (credit:ANTHONY WALLACE via Getty Images )
(09 of10)
Open Image ModalA journalist (L) buys a book featuring former Chinese political heavyweight Bo Xilai and Chinese President Xi Jinping (centre L) on the cover at the warehouse of Hong Kong-based publisher Mighty Current in Hong Kong on January 2, 2016. A missing Hong Kong employee from a publisher of books critical of China was \'assisting in an investigation\', his wife said on January 2, as the city\'s deputy leader sought to reassure residents over their safety. AFP PHOTO / ANTHONY WALLACE / AFP / ANTHONY WALLACE (Photo credit should read ANTHONY WALLACE/AFP/Getty Images) (credit:ANTHONY WALLACE via Getty Images)
(10 of10)
Open Image ModalA book with Chinese President Xi Jinping (C on book) is displayed at the warehouse of Hong Kong-based publisher Mighty Current in Hong Kong on January 2, 2016. A missing Hong Kong employee from a publisher of books critical of China was \'assisting in an investigation\', his wife said on January 2, as the city\'s deputy leader sought to reassure residents over their safety. AFP PHOTO / ANTHONY WALLACE / AFP / ANTHONY WALLACE (Photo credit should read ANTHONY WALLACE/AFP/Getty Images) (credit:ANTHONY WALLACE via Getty Images)