Zhao Yu (赵宇) is a Chinese name, and its pronunciation can be broken down as follows:

• Zhao (赵) is pronounced as "jow" (similar to the English word "joe" without the "e" at the end)
• Yu (宇) is pronounced as "yoo" (similar to the English word "you" without the "ou" sound)

So, the full name Zhao Yu is pronounced as "jow yoo".