The Sword of Goujian is an ancient Chinese sword. It is the only ancient Chinese sword which is still among us and can be seen in a museum. The other legendary Chinese swords have never been found. It is a tin bronze sword, renowned for its unusual sharpness, intricate design and resistance to tarnish rarely seen in artifacts of similar age. The sword is generally attributed to Goujian, one of the last kings of Yue during the Spring and Autumn period. In 1965, the sword was found in an ancient tomb in Hubei. It is currently in the possession of the Hubei Provincial Museum. In 1994, the sword was damaged by a worker while on loan to Singapore, since then China has forbidden the sword to be exhibited abroad. On one side of the blade, two columns of text are visible. Eight characters are written in an ancient script, now known as Bird-worm seal script. Initial analysis of the text deciphered six of the characters, "King of Yue" and "made this sword for his personal use". The remaining two characters were assumed to be the name of the particular King of Yue. From the sword's origin in 510 BC to the kingdom's demise at the hands of the Chu in 334 BC, nine kings ruled Yue, including Goujian. Goujian's reign coincided with arguably the last major conflict of the Spring and Autumn period, the struggle between Wu and Yue, wherein he eventually led his state to victory, annexing the rival. As such King Goujian is sometimes considered the last of the Five Hegemons. The sword of Goujian is 55.6 centimetres (21.9 in) in length, including an 8.4 centimetres (3.3 in) hilt; the blade is 4.6 centimetres (1.8 in) wide at its base. The sword weighs 875 grams (30.9 oz). In addition to the repeating dark rhombi pattern on both sides of the blade, there are decorations of blue crystals and turquoise. The grip of the sword is bound by silk, while the pommel is composed of eleven concentric circles. The Sword of Goujian still has a sharp blade and shows no signs of tarnish. To understand why, scientists at Fudan University and CAS used modern equipment to determine the chemical composition of the sword. The body of the blade is mainly made of copper, making it more pliant and less likely to shatter; the edges have more tin content, making them harder and capable of retaining a sharper edge; the sulfur decreases the chance of tarnish in the patterns. It is likely that the chemical composition, along with the almost air-tight scabbard, led to the exceptional state of preservation.