 Desperate, Lord Mengchang sent a messenger to bribe King's Zhaoxiang's favourite concubine, who demanded a snow fox fur coat, which Lord Mengchang had already given to King Zhaoxiang as a gift when he first arrived and had to steal back from the royal vault.Thanks to the pleas of the concubine, Lord Mengchang was released within two days, and he quickly smuggled himself out of Qin, narrowly evading a small army that King Zhaoxiang had ordered to pursue him.In 298 BC, the disgruntled Lord Mengchang, who was now the newly appointed chancellor of Qi, lobbied for a combined force of Qi, Han and Wei and laid siege to the Qin fortification of Hangu Pass.