The Three Links or Three Linkages (Chinese: 三通; pinyin: sān tōng) was a 1979 proposal from the National People's Congress of the People's Republic of China (PRC) to open up postal (simplified Chinese: 通邮; traditional Chinese: 通郵; pinyin: tōng yóu), transportation (especially airline) (通航; tōng háng), and trade (通商; tōng shāng) links between Mainland China and Taiwan, with the goal of unifying Mainland China and Taiwan.