As a genius, I am the weakest in my family?

Chen Zhian traveled through time and space to become a playboy in the Tang Dynasty. He entered the prison at the beginning and found that his eldest brother might be a hidden boss, his second brother was the son of destiny, his father was the strongest sixth brother, and his sister was the reincarnation of the empress... The young marquis who had been praised as a genius for more than ten years turned out to be the weakest one in the family...