In 1967, during the Vietnam War, Ho Chi Minh, the leader of North Vietnam (which was at war against South Vietnam and the United States), asked Chinese Premier Zhou Enlai for help in developing a malaria treatment for his soldiers trooping down the Ho Chi Minh trail, where a majority came down with a form of malaria which is resistant to chloroquine.
1967 年越战期间，北越（当时与南越和美国交战）领导人胡志明请求中国总理周恩来帮助开发一种疟疾治疗方法，其手下士兵在胡志明小道上行军时，其中大多数人都患上了一种对氯喹有抗药性的疟疾。