(People got to Taiwan only because the law was not strictly enforced.) After the Western imperial powers resorted on several occasions to blockading China's ports to pressure the government, the Ching court beganto pay more attention to the consolidation of coastal defenses.
後來西方列強屢屢由海上叩關，清廷開始重視鞏固海疆。英法戰爭後，清廷開始推行富國強兵運動，對台灣益發重視。