Although Professor Qiu is nearly 70 years old, he is still very active in mathematics research in recent years. In just 20 15 a year, I have published 23 articles on arxiv, and conducted high-quality mathematical research at the speed of two papers a month, which is beyond the reach of any mathematician throughout the ages! You know, Professor Qiu, as a leading figure in the field of mathematics in China, has to deal with hundreds of emails every day. Friends who are familiar with Professor Qiu know that even at the seminar, he has to listen and talk while sending and receiving emails on his mobile phone. In such a busy situation, it is really shocking to write two papers a month. Professor Qiu also attaches great importance to cooperation with young people. In recent years, almost every paper has been accompanied by some young mathematicians and generously signed with them. Because he brought too many young mathematicians, he often even forgot his collaborators. For example, a Korean mathematician cooperated with him before and hoped that Professor Qiu could help him write a letter of recommendation when looking for a teaching position. Professor Qiu admitted that he didn't know him. In fact, Professor Qiu's ignorance of his collaborators can reflect that he has helped so many young people and can't remember all the good things he did! Fan Zhongyan said: Yunshan is grey, the rivers and seas are vast, the gentleman's wind, the mountains are high and the water is long. Mr. Qiu, who is nearly seventy years old, never stops writing. He is really our model!