QUOTE(scholars @ Nov 26 2007, 09:10 PM)

I searched lots of web site, and follow to the source that I can get, for example,
http://www.worldcrossbow.com/history.htmlCan you give me some reference that Vietnamese invented the crossbow?
Scholars:
There is a Vietnamese ledendary story about the magic crossbow that every student learns in Vietnamese school.
http://en.wikipedia.org/wiki/An_D%C6%B0%C6...V%C6%B0%C6%A1ngThe Legend of Cổ Loa Thành and the Magic Crossbow
[edit] Cổ Loa Thành and Âu Lạc
After Thục Phán defeated the last Hùng Vương King and ascended to the throne as An Dương Vương, he renamed Văn Lang to Âu Lạc and established Co Loa Citadel (古螺) as the new capital. He saw the strategic and geographic importance of Cổ Loa. On two of its sides, Co Loa was surrounded by impenetrable mountains and forests. There was also a river flowing by. No one knows why did An Dương Vương favored the spiral, shell-like shape of Cổ Loa Thành, but legend has it that its construction was extremely tough, and difficult to complete. Each time it seemed it was almost done, it was undone at night by a coalition of spirits which were thought to be allied to the son of a previous king.
[edit] The Legend of Cổ Loa and the Magic Crossbow
An Dương Vương burnt incense, prayed, made offerings, and evoked all the gods of those days to help him. One night, in a dream, a very, very old and venerable man with long, white hair came to him and told him the only person who could help him out of this conundrum was a golden turtle that lived somewhere around Cổ Loa.
A few days later, while wandering in a boat on the river and thinking about the meaning of his dream, a gigantic golden turtle appeared suddenly at the surface of the water. The golden turtle told An Dương Vương that he would need one of its claws in order to accomplish anything in his life. Pulling out one of its claws and throwing it to An Dương Vương, the turtle vanished.
An Dương Vương had Cao Lỗ, his weaponry engineer, build a crossbow incorporating this claw. It is said a single arrow shot from this crossbow of the Golden Tortoise could kill hundreds, even thousands of enemies. Indeed right after obtaining this claw, An Dương Vương saw his fortunes change. His capital started taking shape. His kingdom prospered and soon was coveted by neighboring states. Among one of those who coveted his territory was Zhao Tuo (Triệu Đà in Vietnamese), a Qin general under the reign of Qin Shi Huang and his successor. For a period of ten years around 217 BCE to 207 BCE, Triệu Đà attempted many invasions to conquer Âu Lạc state, but failed each time due to An Dương Vương's military skills and defense tactics.
[edit] Triệu Đà's Scheme
Triệu Đà (趙陀), having been beaten several times, devised a new plan. Keeping to himself that it was just a temporary ploy to buy time, he negotiated a peace treaty with Âu Lạc (甌雒/甌駱) state. He set out to determine where lay the strength and strategies of his foe. He even went so far as to propose marriage between An Dương Vương’s daughter, Princess Mỵ Châu (Mei Zhou) and his son Trọng Thủy (Zhong Shu'i). In time Triệu Đà found out through his daughter-in-law Mỵ Châu that An Dương Vương had a magic crossbow that made him almost invincible. In reality, the secret military technology of bronzed-cast arrows with some kind of fire-attachment invention by the Âu Lạc state was one of their famous arsenals that was used against the Qin armies and soundly defeated them on many occasions in the past. Eventually, when Triệu Đà figured out a new scheme to infiltrate the war arsenal secrets and military tactics of Âu Lạc was when he told his son Trọng Thủy to sneak into his father-in-law's armory and steal this "magic crossbow", replacing it with a fake. Triệu Đà, with the magic crossbow in his hands, launched a final, decisive attack on his foe and in-law An Dương Vương.
[edit] The loss of Cổ Loa and the Magic Crossbow
Miraculously enough, Cổ Loa fortress fell into Triệu Đà's hands. For An Dương Vương this was a major disaster. He grabbed Mỵ Châu, his only daughter, and fled the scene of the battle. Riding on his horse with Mỵ Châu behind him he called out in despair, “What happened to my crossbow? It does not work anymore! Why? Why?” At that very moment, the giant golden turtle An Dương Vương had not seen for years and years, suddenly reappeared in the river. He replied to An Dương Vương, “The person responsible for this disaster, the enemy you are looking for, is sitting right behind you, your majesty!”
An Dương Vương reined in his horse and confronted his daughter, who was in tears. Angered, feeling betrayed by his daughter and son-in-law, the king slew his daughter (in a popular version of the tale he beheaded her). Then he jumped into the river with the giant golden turtle. Some say he drowned himself; some say his faithful servant the golden turtle took him to the depths of the river.
Trọng Thủy, searching for his beloved wife, arrived a few minutes later at the scene. The body of his beloved wife was lying in a pool of blood and his father-in-law was nowhere to be seen. In accordance with conjugal fidelity and devotion, he drew his sword and killed himself as well, in order to be with his wife forever and eternity.
Having achieved the defeat of his rival, Triệu Đà annexed the newly conquered territory to his own, ascended to the throne, and proclaimed himself a new emperor, founding the Triệu Dynasty (207 BCE-111 BCE).