The Legend of the Magpie Bridge Society

This is a beautiful but also a very sad story. I don't know how many years it has been spread among the people. It is said that this story spread all over the north and south of the Yangtze River and both sides of the Yellow River a long time ago. So what kind of story is this that has been able to flourish among the people for so long? Don't be impatient, please listen to me.