King Yi of Yan, surnamed Ji, was named Ominous, son of Duke Wen of Yan, and the first monarch of the State of Yan to claim the title of King.
In the first year of King Yi of Yan, King Xuan of Qi took advantage of the opportunity of the Yan state to rule the state and capture ten cities of the Yan state. King Yi of Yan ordered Su Qin to send an envoy to the State of Qi, and relying on Su Qin's three inches of incorruptible tongue, he successfully reclaimed the taken city from the State of Qi.
In the ninth year of King Yan yi, Su Qin's private affair with Lady Wen of Yanhou was learned by King Yan Yi, but he did not blame Su Qin for this, but treated him more kindly.
Earlier, Su Qin traveled around the world in order to 'conspire with the connivance' grand plan, and some people had slandered him in front of King Yan Yi. Saying that he is a villain who swings left and right, betrays the country, and is capricious will inevitably cause trouble for the Yan country. If it were not for Su Qin's astuteness and eloquence, he persuaded King Yan Yi, and his fate could be imagined.
Nowadays, such an ugly thing has happened, but King Yan Yi did not see any anger at all, but treated him even more kindly, and Su Qin felt very panicked. In order to avoid the scourge of killing, he took the initiative to propose to King Yi of Yan to go to the State of Qi to better benefit the State of Yan.
King Yan Yi agreed to Su Qin's request, and the two performed a play together, allowing Su Qin to successfully win the trust of King Xuan of Qi. Su Qin also did not live up to the trust of King Yi of Yan, and successfully instigated King Xuan of Qi to build more palaces and expand gardens, which greatly depleted the financial resources of the State of Qi, and while obtaining intelligence for the State of Yan, weakened the strength of the State of Qi, and achieved the purpose of strengthening the State of Yan in disguise.
Ten years after King Yi of Yan, King Yi of Yan participated in the 'Xiang Wang of the Five Kingdoms' led by King Hui of Wei and mediated by Gongsun Yan, becoming the first monarch in the history of the State of Yan to claim the title of king.
King Yi of Yan died in the twelfth year of his reign, and was succeeded by his son King Yi of Yan.