The Chinese characters "淇 yu" can be read as "Qí yǔ".
For "淇 (Qí)", it is pronounced similar to the English word "chee".
As for "yu", if it is "雨 (yǔ)", it is pronounced like "yoo". If it is "宇 (yǔ)", it could be pronounced similar to "yoo" as well but with a different tone. Different characters pronounced as "yǔ" might have slightly different nuances in pronunciation, but generally, they all have a similar basic sound. Without knowing exactly which character "yu" is, this is a general guide to its pronunciation.