King Zhaoxiang of Qin
Because King Zhaoxiang had not yet legally come of age (traditionally at the age of 20), his mother, who was now known as Queen Dowager Xuan, became the regent. She was supported by her brothers, Wei Ran and Mi Rong (羋戎), as well as two other sons, Prince Yi (公子悝) and Prince Fu (公子巿), the four of them collectively known as the "Four Nobles" (四貴).
The Legend of Ba Qing
The drama chronicles the life of Ba Qing, the wealthiest woman of the Qin Dynasty. She is known to have provided mercury for the first Emperor of China's mausoleum, and also funded construction works for the Great Wall. She is referred to as the older sister by Ying Zheng, the Emperor of Qin Dynasty and they become involved in a complicated romance.