Productive prefix-style adjective for any newly attained role or status: 新晋影帝 (Best Actor), 新晋富豪 (rich-list newcomer), 新晋妈妈 (new mom), 新晋作家 (debut author). Common in entertainment news headlines.
memory
晋 (jìn) means 'advance / be promoted' — same character as in 晋升 ('get promoted'). 新晋 = 'newly advanced.'