a new province, Ba Province, with five commanderies and recommended himself to be the Inspector of this new Ba Province. Zhuge Liang did not agree to Li Yan's suggestion. Li Yan however reassigned his position to Jiangzhou (江州; in present-day Chongqing). In the following years, Li Yan and Zhuge Liang shared a competitive, yet cooperative relationship. In a letter to the recently defected Meng Da, Li Yan wrote that both Kongming and him were entrusted with a difficult task and a lot of responsibilities follows it. Yet, he was lucky to have such a great partner. Zhuge Liang also wrote a letter to Meng Da where he praised Li Yan's abilities and conduct. Li Yan once sent a letter to Zhuge Liang, stating the latter should receive the nine bestowments and become a vassal king of the Shu regime; Zhuge Liang replied that he would do so only after Shu had vanquished its rival state, Wei. The letter was written as such : In August 230, the Wei general Cao Zhen launched a punitive campaign against Shu as a form of retaliation against Zhuge Liang's previous attacks. Zhuge Liang urged Li Yan to lead 20,000 troops to Hanzhong Commandery to defend against the Wei invasion. However, Li Yan did not want to leave his home base and serve under Zhuge Liang, so he told the latter that he should have the right to open an office (just like Zhuge Liang) as a co-regent. Zhuge Liang denied Li Yan's request, but appeased him by allowing his son, Li Feng, to replace him if he did come to Hanzhong Commandery. Li Yan finally went to Hanzhong Commandery under persuasion and pressure from Zhuge Liang. As a logistic officer After the Wei attack stalled due to continuous rainfall, Li Yan was not permitted to go back to the east. Instead, Zhuge Liang included Li Yan as a member of his cabinet, granting the latter access to the Imperial Chancellor's office to help prepare for future campaigns against Wei. Thus, Li Yan changed his name to "Li Ping", compromised on Zhuge Liang's war plan, and accepted the role of a logistic officer for Zhuge Liang's fourth northern expedition. As the fourth expedition dragged on for months, Zhuge Liang and the Wei general Sima Yi had been having a series of battles around Mount Qi, and both sides needed backup supplies. However, rainfall rendered the