Correct
三大作风
/ sān dàzuò fēng /
Strokes
Example
As a Noun
three important styles of work of the Party ［i.e. integrating theory with practice, forging close links with the masses and practising self-criticism］
three important styles of work of the Party ［i.e. integrating theory with practice, forging close links with the masses and practising self-criticism］