While attending an annual spring ceremonial ritual at Bashang (灞上) in 139 BC, during the second year of his reign, Emperor Wu decided to pay a casual visit to his older sister's household on the way back. His sister, Princess Pingyang (平陽公主), who had long intended to imitate her aunt Princess Guantao and establish herself some political leverage, had prepared a collection of young women to offer for her brother's concubinage. However, her plan did not work out, as none of her candidates managed to impress Emperor Wu. Realizing her brother was disappointed and bored, she called in her in-house dancers for entertainment. This time, Emperor Wu set his eyes on a beautiful young singer called Wei Zifu (衛子夫) and had immediately fallen in love with her. Following a romantic encounter with Wei Zifu, Emperor Wu immediately conferred a thousand pieces of gold to his sister as a reward, who in turn offered the new girl to him as a gift. However, after returning to Chang'an, Emperor Wu was forced to abandon Wei Zifu as an insignificant palace maid and neglected her for over a year under pressure from Empress Chen. They did not meet again until Wei Zifu attempted to leave the palace by blending into a queue of maids due to be expelled. With the old love renewed, Wei Zifu soon fell pregnant, effectively clearing Emperor Wu of any speculation of infertility. This ensured her becoming his favourite concubine.