中韓友好條約 韓國華僑 中韓外交 臺韓外交 反共外交 華僑經濟 韓僑 僑民 反共主義 Treaty of Amity between the Republic of China and the Republic of Korea Overseas Chinese in Korea ROC-Korea diplomacy Taiwan-Korea diplomacy Anti-communist diplomacy Overseas Chinese economy Overseas Korean Anti-communism