Observation is the most straightforward and convinced method in anthropology. When study the behavior of human beings, we want to figure out how friends communicate with each other without any conflict and how people get in touch with someone strange. By observing five people playing basketball on the court for 15 minutes, taking notes of their behaviors and conversations and making hypotheses of their thoughts and feelings, I get some gratifying feedback. People would like to get involve with others who have same hobbies, positions and characteristics to resonate. The strategy used by human beings forms different groups and, furthermore, various
