C City and B City were both first-tier cities, with armed forces of the sea, land, and air. Commander Zhang was the head of the military headquarters of the air force and was at the same level as Yi Yunrui. He was shocked by this call from Yi Yunrui.

"Yes, sir, Commander Yi."

"Hello." As they were all soldiers, there was not much politeness in speaking. Yi Yunrui directly stated his purpose, "A helicopter took off from C City half an hour ago. Its destination ...