Who are the first bitter and then sweet people in history? 20

Zhou Wenwang, Su Qin, Zhu Yuanzhang, Genghis Khan, Yi Yin, Gou Jian, Liu Bei (born selling sandals), Wei Qing (born riding slaves), Han Xin, Jin Wengong (born in exile for decades) and Fu Shuo.

(that is, the famous minister who is "held between castles and towers"), Zuo Si (the story of Luoyang Paper Expensive is about him), Bai Xixi (the story of "held in the city" is about him), Kuang Heng, Sun Kang, Che Yin and Fan Zhongyan (the family is already very poor).