This idiom means that cranes sing in deep water, and their voices can reach the sky. Used to describe a loud, crisp and pleasant voice that spreads far away. The idiom "Jiu Hao" refers to the depths of the Zehe River, while "Crane" is an elegant bird, which is often endowed with auspicious and noble symbolic meanings. Therefore, the idiom "heming is high" is often used to describe elegant and noble things or sounds. "Nine heights with Yu Ming" is also used to describe that a saint's reputation can spread far and wide. Even if he lives in a remote place, his talent and morality can be understood and appreciated by people. Therefore, this idiom can also be used to praise those who are talented and virtuous.