Red Mansion: After Changing Gender, He Began to Take the Imperial Examination and Become an Official

He has traveled through time! He became Lin Daiyu, which means he is the heroine in "Dream of Red Mansions", but why is he a man? Is the sister the young son who died young as described in the original novel? He must try his best to avoid his fate and become a big shot in the imperial examination! Intention: Fate is the complaint of the weak, luck is the humility of the strong.