“Better known as the Secret of the Golden Flower, this is a famous neidan text that the Western world came to know through Richard Wilhelm's 1929 translation. The Chinese text used by Wilhelm was edited by Zhanran Huizhen zi in 1921. Besides this, at least five more versions are available, all of which date to the late Qing dynasty (1644-1911) and are ascribed to Lu Dongbin, who revealed them through spirit writing.”