The Shelter for Deposed Crown Princes

An ordinary modern young man encounters six tragic deposed crown princes—Fu Su, Zhu Biao, Liu Ju, Yang Yong, and Li Chengqian—and uses modern medicine to cure their chronic ailments. He teaches them modern knowledge, helps them amass vast wealth, and ultimately sends them back to their own eras, where they rewrite their fates and overturn centuries-old tragedies. — Description from novelcodex.org