Wu (; Old Chinese: *) was one of the states during the Western Zhou dynasty and the Spring and Autumn period. It was also known as Gouwu ( /*/) or Gongwu ( /*/) from the pronunciation of the local language. Wu was located at the mouth of the Yangtze River east of the State of Chu. Its first capital was at Meili (probably in modern Wuxi) and was later moved to Gusu (姑蘇, modern Suzhou) and then Helu City (the old town of present-day Suzhou). History A founding myth of Wu, first recorded by Sima Qian in the Han dynasty, traced its royal lineage to Taibo, a relative of King Wen of Zhou. According to the Records of the Grand Historian, Taibo was the oldest son of Gugong Danfu and the elder uncle of King Wen who started the Zhou Dynasty. Gugong Danfu had three sons named Taibo, Zhongyong, and Jili. Taibo was the oldest of three brothers, Jili being the youngest. Realizing that his youngest brother, Jili, was favored by his father to inherit the throne of Predynastic Zhou, the older brothers Taibo and Zhongyong left Zhou to avoid conflict and settled southeast to Wu with a group of followers loyal to him and his brother Zhongyong. They established their first capital at Meili (), believed to be today's Meicun in Wuxi. Taibo's youngest brother Jili who was eventually the heir of the throne became the father of King Wen, who is attributed to starting the Zhou dynasty. Little is known about the history of Wu before the Spring and Autumn period. Wu rose to power in the 6th century BC, after it was aided by the State of Jin as a useful ally against the State of Chu. In 584 BC, Wu rebelled against Chu upon the advice of Wuchen, a Jin minister, who defected from Chu. From then on, Wu would become a constant threat to the Chu Kingdom. Wu planted seeds of rebellion amongst Chu's vassals along the Yangtze valley. Wu Zixu, a highly influential Chu politician's mother and brother was murdered by King Ping of Chu and fled to Wu plotting revenge. Wu Zixu later became a trusted advisor of Prince Guang and helped him assassinate his cousin King Liao of Wu and usurp the throne. After the successful assassination of King Liao, Prince Guang ascended the throne and became known as King Helü of