Zhou's Four Principles
Four Principles of Zhou Enlai or simply Zhou's Four Principles (Chinese: 周四原則; pinyin: zhōusì yuánzé) were presented by China's Premier Zhou Enlai as conditions for continuing trade between China (PRC) and Japan when Kenzō Matsumura visited China on April 19, 1970. It is said that the China side's intention behind these conditions was to counter the hostile policy toward China adopted by the Satō Cabinet in Japan at the time.