These three black students are very strong and tall. It is estimated that they are more than 1.8 meters, with a strong back and a pure black skin, which gives people a strong visual impact, and has the domineering power of a male lion on the African grassland. The already short dad was even smaller in the middle of them. But these black people have great respect for their father. For the first time, I met three pure black people. Novelty was my greatest feeling. Curiosity made me ask three black graduate students some funny questions from time to time. However, they were still young men in their early twenties. They were still childish and willing to answer my questions. They also joked with me. We gradually became familiar with them.