My teacher told me "heart to heart" is to maintain each other's center line of body in line. But you are right, them didn't told me how and why to do so.

I guessed my situation might not so bad.

Why? When I said I didn't "focus on" or "care about", I just meant I didn't do "heart to heart" on purpose, that was because if I paid more attention at "heart to heart" (with my eyes),it seemed more hard to reach(I will try to use force to get it!).
Sorry, I thougt maybe I use the worng words to describe it last time.

And now I don't look at her too much. Just leading her and ,follow, leading. I use my the feeling of weight and moment as my eyes. So I take any next steps or action after just feeling her weight had reached balance and finish last step well.

Thank you David, I will ask my teacher to check my position again.

As for leading, now I can change many beginners (even them didn't remember figures well) and still leading well without problems by this methond. They told me, my leading skills is not bad, they could feel the rhythme of waltz's rise and fall, and didn't need to think about what steps she should step,(such as spin, reverse, natural turn, ouside change, weave from pp).

...well....

Thanks you

john shue