鸦片战争爆发后,清朝内外局势发生重大变化。以李鸿章为代表的洋务派认为,面对“变局”形势,中国应该大力开展以近代化海军与海防设施为中心的海防建设,其“变局”观的发展与清朝海防建设的实施有重要的因果关系。 After the Opium War broke out, major changes have taken place in the situation both inside and outside the Qing Dynasty. The Westernization School, represented by Li Hongzhang, believes that in the face of the “changing situation”, China should vigorously carry out the coastal defense construction that takes modern naval and coastal defense facilities as its center. Its development of “changing situation” and the implementation of coastal defense construction in the Qing Dynasty There is an important causal relationship.