Who is better, Zhang Yimou or Yang Zhenning?

Zhang Yimou and Yang Zhenning are the best. Yang Zhenning, an academician of China Academy of Sciences and winner of the Nobel Prize in Physics, has made great contributions to the development of the whole academic field. Zhang Yimou is the director, and he didn't promote academic progress. So Zhang Yimou and Yang Zhenning are better than Yang Zhenning.