talk about Chinese wedding

Double Happiness

　　A large Chinese character, Double Happiness, on a red piece of paper or in paper cut is always put where it must strike the eyes on a young couple's wedding. It has a story behind it.
　　In the ancient Tang Dynasty, there was a student who was on the way to the capital to attend the national final examination, in which the top learners would be selected as the ministers in the court. Unfortunately, he fell ill halfway when he passed through a mountain village. Thanks to a herbalist doctor and his daughter, he was taken to their house and treated well. He recovered quickly due to the father and the daughter's good care. Well, when he had to leave, he found it hard to say good－bye to the pretty girl, and so did she. They fell in love. So the girl wrote down the right hand part of an antithetical couplet for the student to match:
　　"Green trees against the sky in the spring rain while the sky set off the spring trees in the obscuratio