There are love stories that are written in books. There are love stories that are written in songs. And then there are love stories that are written across the sky. Long before roses, chocolates, greeting cards, and February 14 became symbols of romance, ancient Chinese people looked upward and saw two stars separated by a great river of light. One star was Vega . The other was Altair . Between them stretched the Milky Way the Heavenly River. And from those stars came one of China's most enduring love stories: The Cowherd and the Weaver Girl.  A story so powerful that generations of Chinese families have told it to their children, and children have carried it forward to their children. This is the story behind Qixi (七夕)  the Double Seventh Festival, often called Chinese Valentine's Day . And honestly? It is one of the most beautiful love stories I have ever heard. Once Upon a Time... Long ago, there lived a young man named Niulang (牛郎)  the Cowherd. He was not wealthy. He...