In the early 700s, Neidan (also known as internal alchemy) was adopted by Daoists as a new form of alchemy.
ɪnðɪ ˈɜːli sˈɛvənhˈʌndɹɪd z, nˈiːdən ˈɔːlsoʊ nˈoʊn æz ɪntˈɜːnəl ˈælkəmi wʌz ɐdˈɑːptᵻd baɪ dˈaʊɪsts æz ɐ nˈuː fˈɔːɹm ʌv ˈælkəmi.