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).
King Zhuangxiang of Qin
King Zhuangxiang died in 247 after reigning for three years. Ying Zheng succeeded him and eventually unified China through a series of wars beside the other six major states, established the Qin Dynasty in 221 BC, and became historically known as "Qin Shi Huang" (First Emperor of Qin).