King Wei of Qi
Ruler of Qi between 356 BC and 320 BC
About King Wei of Qi
Lived 370 BC – 320 BC (aged 49–50).
King Wei of Qi , personal name Tian Yinqi , was a ruler of the Qi state, reigning from 356 BC to 320 BC, or according to another source from 378 BC to 343 BC. He was the first ruler of Qi to style himself "king".
Life In the Intrigues of the Warring States, the strategist Su Qin is quoted as telling the king of Qin: "Kings Wei and Xuan of Qi were the worthiest rulers of their age. Their power was great and their lands were broad. Their states were wealthy and their citizens capable. Their generals were aggressive and their troops strong."
King Wei was judicious and measured in his actions toward his subordinates. At one point he was told repeatedly by his spies that one of his generals, Zhangzi, had surrendered to the enemy, Qin. King Wei refused to believe that Zhangzi had deserted. Sure enough, "a short while later it was reported that Qi had won a great victory. The king of Qin proclaimed himself a vassal of the western borders and made his apologies to Qi." King Wei said that he always knew Zhangzi was faithful and cited this story in his defence.
According to another story, King Wei proclaimed that "To all ministers, officers and citizens who criticize my faults in front of me, they will get the highest reward; those who remonstrate with me in writing will be given the next highest reward, and to those who overhear criticism of me and convey it to my ears will go the least reward." It was said that initially, "the doorway to the king's chamber looked like a marketplace" but after a year, "none who spoke to the king had petitions to present" . "When Yan, Zhao, Han and Wei heard of this they all came to court at Qi."
King Wei employed Sun Bin as chief military advisor. Sun Bin had been punished with mutilation of his knees in Wei at the instigation of his enemy Pang Juan. King Wei's commander Tian Ji recruited him to come to Qi. As Sun Bin could not sit on a horse, he refused when King Wei offered him the actual command of the army. Sun Bin wrote Sun Bin's Art of War, in which King Wei and Tian Ji question Sun Bin on strategy and tactics. Sun Bin was influential in devising the strategy for the Qi triumph at the Battle of Maling in 342 BC, which considerably weakened the rival state of Wei. Pang Juan died there. "Late in his reign, he sent out armies against Qin and Zhao."
His son Tian Ying was the father of Lord Mengchang.
Family Queens: Queen Wei
Concubines: Wey Ji, of the Ji clan of Wey , the mother of Prince Jiaoshi Yu Ji, of the Yu clan , personal name Juanzhi
Sons: First son, Crown Prince Pijiang (; 350–319 BC), ruled as King Xuan of Qi from 319 to 301 BC Second son, Prince Ying , the father of Lord Mengchang Known by his title, Lord Jingguo Served as the Prime Minister of Qi Granted the fiefdom of Xue in 322 BC Prince Jiaoshi
Ancestry
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Important facts
Family & relationships
People in King Wei of Qi's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped King Wei of Qi's
Frequently asked questions
Who was King Wei of Qi?
Ruler of Qi between 356 BC and 320 BC
When was King Wei of Qi born?
King Wei of Qi was born in 370 BC.
When did King Wei of Qi die?
King Wei of Qi died in 320 BC.
What nationality was King Wei of Qi?
King Wei of Qi's recorded nationality: Qi.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). King Wei of Qi. https://biography.guide/king-wei-of-qi/
MLA: "King Wei of Qi." Biography.guide, https://biography.guide/king-wei-of-qi/.
Chicago: "King Wei of Qi." Biography.guide. https://biography.guide/king-wei-of-qi/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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