Xiānbèimen wèi guójiā de fāzhǎn zuòchū le jùdà gòngxiàn.
Our forefathers made great contributions to the country's development.
Tips
usage
先辈 is more formal and respectful than 祖先 (ancestors in a genealogical sense). It often refers to previous generations who achieved something noteworthy, not just blood relatives.
