My husband and I went to Tianjin on a business trip and made a pair of good friends: Feng is my college classmate, and her husband Ping is Feng's colleague. They have been missing for many years and have been chatting with each other very well at Feng's house. I chatted with Feng for more than two hours and talked in every aspect. I always feel that Feng always involves my husband in the conversation. I also want to ask Ping's situation from time to time. I think: What kind of thing may happen...