The legend has been handed down for nearly 2 millennia. The story has been recorded as far back as the Jin Dynasty (256-420 AD). Poets composed hundreds of verses on the love story and many types of Chinese opera tell the story.
The Chinese people believe that the star Vega(织女星), east of the Milky Way, is Zhi Nu and, at the constellation of Aquila(天鹰座), on the western side of the Milky Way, Niu Lang waits for his wife.
Zhi Nu was said to be the youngest of seven daughters of the Queen of Heaven. With her sisters, she worked hard to weave beautiful clouds in the sky, while Niu Lang was a poor orphan cowherd, driven out of his home by his elder brother and his cruel wife.
Niu Lang lamented over his lonely and poor life with an old cow, his only friend and companion. The magical cow kindly told him of a way to find a beautiful and nice woman as his life companion.
Under the direction of the cow, Niu Lang went to the riverside on an evening, where the seven fairies slipped out of their heavenly palace to bathe.
He took one of the beautiful silk dresses the fairies had left on the bank. When the fairies left the water, the youngest couldn''t find her clothes and had to see her sisters fly back to heaven without her.
Then Niu Lang came out with the dress and asked the youngest fairy, Zhi Nu, to stay with him.
Several years passed on Earth, which were only a few days in heaven. Niu Lang and Zhi Nu lived happily together and had two children before the Queen of Heaven discovered Zhi Nu''s absence.
She was so annoyed she had Zhi Nu brought back to heaven. Seeing his beloved wife flying in the sky, Niu Lang was terrified. He caught sight of the cowhide hanging on a wall. The magical cow had told him before dying of old age: "Keep the cowhide(牛皮) for emergency use."
Putting the cowhide on, he went after his wife with his two children.
With the help of the cowhide, Niu Lang was able to follow Zhi Nu into heaven. He was about to reach his wife when the Queen showed up and pulled off her hairpin to draw a line between the two. The line became the Silver River in heaven, or the Milky Way.
Zhi Nu went back to the heavenly workshop, going on weaving the clouds. But she was so sad, and missed her husband across the Silver River so much that the clouds she weaved seemed sad. Finally, the Queen showed a little mercy, allowing the couple to meet once every year on the Silver River.
民间爱情传说之一的牛郎织女的故事。
七夕节始终和牛郎织女的传说相连，这是一个很美丽，千古流传的爱情故事，是我国四大民间爱情传说之一。
相传在很早以前，南阳城西牛家庄里有个聪明、忠厚的小伙子，父母早亡，只好跟着哥哥嫂子度日，嫂子马氏为人狠毒，经常虐待他，逼他干很多的活，一年秋天，嫂子逼他去放牛，给他九头牛，却让他等有了十头牛时才能回家，牛郎无奈只好赶着牛出了村。
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一天，天上的织女和诸仙女一起下凡游戏，在河里洗澡，牛郎在老牛的帮助下认识了织女，二人互生情意，后来织女便偷偷下凡，来到人间，做了牛郎的妻子。织女还把从天上带来的天蚕分给大家，并教大家养蚕，抽丝，织出又光又亮的绸缎。
牛郎和织女结婚后，男耕女织，情深意重，他们生了一男一女两个孩子，一家人生活得很幸福。但是好景不长，这事很快便让天帝知道，王母娘娘亲自下凡来，强行把织女带回天上，恩爱夫妻被拆散。
牛郎上天无路，还是老牛告诉牛郎，在它死后，可以用它的皮做成鞋，穿着就可以上天。牛郎按照老牛的话做了，穿上牛皮做的鞋，拉着自己的儿女，一起腾云驾雾上天去追织女，眼见就要追到了，岂知王母娘娘拔下头上的金簪一挥，一道波涛汹涌的天河就出现了，牛郎和织女被隔在两岸，只能相对哭泣流泪。他们的忠贞爱情感动了喜鹊，千万只喜鹊飞来，搭成鹊桥，让牛郎织女走上鹊桥相会，王母娘娘对此也无奈，只好允许两人在每年七月七日于鹊桥相会。
后来，每到农历七月初七，相传牛郎织女鹊桥相会的日子，姑娘们就会来到花前月下，抬头仰望星空，寻找银河两边的牛郎星和织女星，希望能看到他们一年一度的相会，乞求上天能让自己能象织女那样心灵手巧，祈祷自己能有如意称心的美满婚姻，由此形成了七夕节。