These three black students are all strong and tall.It is estimated that they are all over 1.8 meters tall, with a bear-back and a tiger-back, and a pure black skin, giving people a strong visual impact, and having the domineering a lion on the African grassland.The already short father is even smaller when he stands among them.But these black people respect their father very much.The first time I was in front of three purebred black men, novelty was my biggest feeling. Curiosity made me ask three black graduate students some questions that they thought were funny, but after all, they were all young men in their early twenties. They were still happy to answer my questions and joked with me. We gradually became familiar with each other.