C89 Strange phone

The call was from a stranger. After I picked up the call, I was somewhat surprised that someone would call me so late. However, when I picked up the call, it was indeed Xu Cong's voice … All he said was "Good evening, Huo Zhong," and nothing else …

There's silence on the other end of the phone. Even after I've fed him a few times, there's still no reply. This voice is definitely Xu Cong's