第一线
dì​yī​xiàn HSK7

forefront

dì​yī​xiàn forefront
  1. 第 dì affix
    [ordinal]
    Prefix used before a number or the question word 几 jǐ to form an ordinal number indicating sequence or rank
  2. 一 yī numeral
    one
    one; the number 1; single; alone
  3. 线 線 xiàn nounverb
    political line
    (political) line; a person's position or role in a specific field of work (e.g. frontline)

dì​yī​xiàn front line
  1. 第 dì affix
    [ordinal]
    Prefix used before a number or the question word 几 jǐ to form an ordinal number indicating sequence or rank
  2. 一 yī numeral
    one
    one; the number 1; single; alone
  3. 线 線 xiàn noun
    boundary
    boundary; demarcation line; frontline; verge; brink