五七指示，即係中華人民共和國文化大革命前夕毛澤東寫嘅《給林彪同志的一封信》。1966年5月7號，毛澤東審閱中央軍委總後勤部《關於進一步搞好部隊農副業生產的報告》後，寫呢封信畀林彪。
The May 7 instruction is "A Letter to Comrade Lin Biao" written by Mao Zedong on the eve of the Cultural Revolution of the People's Republic of China. On May 7, 1966, Mao Zedong wrote this letter to Lin Biao after reviewing the "Report on Further Improving the Production of Agricultural and Sideline Industries in the Army" of the General Logistics Department of the Central Military Commission.