吾家有攻初长成
[wú jiā yŏu gōng chū zhăng chéng]
It's often used in BL (Boys’ Love) stories or fictions, indicating there is a man (usually more dominant, active) growing up. '攻' here refers specifically to an alpha personality or 'dominant' partner type that's quite typical in certain Japanese or Chinese genre fiction. The user may express their preference or appreciation towards the character type.