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 Zhaoxiang of Qin
In 307 BC, King Nan of Zhou hosted King Wu of Qin, who just returned victorious against Han at the Battle of Yiyang. During the visit, King Wu, a keen wrestler, decided to try lifting the "dragon-patterned red cauldron" (龍紋赤鼎) in the Zhou palace. He died from the attempt, bleeding from his eyes and breaking his shin bones. After the childless King Wu died, his hostage half-brother Ying Ji returned to claim the throne as King Zhaoxiang.