Distrustful of the social cost of increased operation, also let a person's mood has been negative. On one hand, on the other hand is wary of strangers complain about "human nature cold"; On the one hand accusations "callousness", on the other hand, remind your family and friends, something less "s". This entanglements hint, from the traditional acquaintances society to strangers society transformation, must deal with good reconstruct social trust, the subjectCold is no accident. Digging, most people will find that, we would have been used to alert eyes, suspected of point of view to treat the stranger.The kindergarten education child: "don't eat stranger candy" and "don't open the door to the stranger"; Old man: in the home told "strange phone number not pick up", "buy things don't listen to the stranger ?