Lü Buwei (呂不韋) - according to Chinese beliefs, he was the real father of the first emperor of China, Qin Shi Huang. The story that he was the real father came about because Qin Shi Huang's mother, the queen, was originally a concubine of Lü Buwei.
Lü Buwei had presented her to Zichu, a prince of the State of Qin (a kingdom in the Warring States Period) who was then serving as a hostage in the State of Zhao (another kingdom in the warring states era). When this prince eventually became king of Qin, he appointed Lü Buwei as prime minister. When he died, Lü Buwei became the regent over the young Qin Shi Huang, son of the queen and the king (officially).
When Qin Shi Huang came of age and became officially empowered, he ordered the death of Lü Buwei. At his death by drinking poison wine ordered by the king, he was said to be laughing to Heaven, and uttered: "If he does not kill me, then he is not fit to be my son."
Lü Buwei also bribed Madam Hua Yang's sister into giving her the idea of cultivating Zichu as her son so that once the king was dead, she could make her adopted son the king and she would have a rosy future.
Lü Buwei was angry about the request as he knew that she was pregnant with his child but as he was already on the greatest business risk he had ever taken, he decided to throw in everything and presented the concubine to Zichu.
Later the concubine who came to be known as Zhao Ju (as she was a citizen of Zhao) give birth to a son whom was named Zheng (later known as Qin Shi Huang) and Zhao Ju was made a wife of Zichu.
LuBuwei was in the meantime being treated quite well, becoming a marquis, and being given the revenue of 100,000 houses.
Excite her it did, so LuBuwei arranged to have the man accused of a crime which calls for the punishment of castration, then faked the deed and let him be hired into the Queen Dowager's service.
LuBuwei was implicated in the matter, and was stripped of his titles, and, fearing further insult, committed suicide.