C630 Don't worry

On the other end, Bing Bing said, "Big brother Cao Ziyang, I might be late today. My flight is late, sorry about that." Cao Ziyang said with an aged voice, "It doesn't matter, please be careful." The two of them chatted for a bit more. Bing Bing already felt that something wasn't right, because she didn't answer any of the calls she made to her parents. This was too strange