1, tone. Nana Ou-yang's intonation is not bad, but there is still a big gap to reach the height of a first-class performer.
2, timbre. This is where I think Nana Ou-yang should be spat and attacked. The timbre she plays is very cold and hard, which can't reflect the characteristics of cello at all. If you listen to the solo of Franz Bartolomi, the chief cellist of Vienna Philharmonic, the warm timbre is in sharp contrast with Ouyang's in Bernstein's playful music.
3. skills. I can say responsibly that Nana Ou-yang has no outstanding skills. I can't imagine what kind of noise she would make if she were asked to play Strauss's Don Quixote. 4. profound. With Nana Ou-yang's existing experience and thoughts, it is impossible to convey the profound connotation of music when playing.
But although everything is not up to everyone's level, she is still young and has plenty of time to study.
We can still see Nana Ou-yang's efforts and he will continue to make progress in his future study career. We can't ask such a child by the standards of great men. We should give him enough time to study, work hard and make progress. I believe it will definitely bring us a more diligent Nana Ou-yang and better works.