Help needed.....much thanks in advance to reply

George, if you are still reading this forum, I could use your expertise. I am trying to translate a chinese saying into latin. It goes like this "The sky is long, the earth is old/ancient (sic), we will never let go". My fiancee who is chinese explains that it means our love will last as long as the sky and earth and so shall never be parted. Hmmm....it sounds nicer in chinese but I want to surprise her. Any help???????