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HANGZHOU, Aug. 2 (Xinhua) -- Chinese Defense Minister Chang Wanquan has warned of offshore security threats and called for substantial preparation for a "people's war at sea" to safeguard sovereignty.

Chang was speaking during an inspection of national defence work in coastal regions of east China's Zhejiang Province.

He called for recognition of the seriousness of the national security situation, especially the threat from the sea.

Chang said the military, police and people should prepare for mobilization to defend national sovereignty and territorial integrity. He also asked to promote national defence education among the public.