I am sorry for the confusion I made, I guess because of my terrible English

I wanted to mean the efficiency of the practice.
While Yuna has a full-time coach Brian who is always on the rink with Yuna skating together to teach her every detail , Mao has a part- time coach Tatiana who lives generally in Russia and that can teach Mao only theoretically.
It is what I thought.
My English is terrible, too.
Brian Orser became Yuna's full-time coach in 2007. What I wrote earlier was about when Yuna learned jumping skills in Korea before that. I heard that she wanted him to be her coach to learn 3A, but he had refused twice before saying yes. However, in an interview with a Korean newspaper, she said she wouldn't try 3A at the moment and she would concentrate on making other jumps more perfect, instead.
I don't think that Tatiana teaches Mao only theoretically. The problem is that she stays in Russia and Mao should go there whenever she needs her coaching....I guess. She really needs a full-time coach who could help her technically and psychologically.