Hong Kong, July 7 -- : Hong Kong Education Bureau has recommended schools to review their book collections and remove those titles that may breach the draconian national security law.

"If any teaching materials including books have content which is outdated or involve the four crimes under the law, unless they are being used to positively teach pupils about their national security awareness or sense of safeguarding national security ... they should otherwise be removed from the school," a spokesperson for the bureau was quoted as saying by by South China Morning Post.

"Schools have a gatekeeping role in terms of choosing suitable teaching resources. The bureau would take serious follow-up actions if any problems arise over the issue," he ...