C352 A hoodlum in a parking lot

After making an appointment with Yan Ruiqi, I called the others and asked for the same time and place. Of course, the people I have asked for all these people are all representatives with powers, so the possibility of having three groups is the highest. First, it's the eldest son of Yan Family, second, it's the second son of Yan Family, and third, it's the son with the smallest Yan Family. Thus