China Population Studies in the new period of reform and opening up、Important pioneers and founders of senior academic disciplines，Renmin University of China Honorary First -level Professor、Doctoral mentor Mr. Wu Cangping has left us for more than half a year，But his old man's sound and laughter、One words and deeds and the teachings of our juniors still clearly appear in front of my eyes，It seems to be yesterday。Live a century of life，More than 70 years of teaching，Mr. Wu is not only a college student who is worthy of our learning and admiration，At the same time, it is also a friend in our daily life world。

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From the first intersection with Mr. Wu to today，It has been close to 40 years。Autumn 1984，My college just graduated and was lucky enough to choose bet365 Play online games through layers，Finally obtained the funding of the United Nations Population Foundation。As a member of the preparatory class abroad，At the Beijing Language Institute, the one -year English and population professional knowledge training for the United States。At the end of 1984，The preparation department for going abroad was very fortunate to invite Mr. Wu, Renmin University of China who was already over the years old, to teach us the knowledge of population。I remember clearly now，Mr. Xi fucks a strong Guangdong accent，The sound of the population is loudly taught for population statistics。The population statistical method he taught is closely combined with reality、Delivery、It is easy to understand，It laid a solid foundation for us to go to the United States to study for a master's degree in population。The late 1990s，Dr. graduated, I stay at Peking University to work，Usually contacting Mr. Wu, there are more up，Especially after I Bet365 app download use aging research as the main research field，I often have the opportunity to meet with Mr. Wu in public places such as academic conferences or degree thesis defense，and ask him to ask him for academic questions。For more than 20 years，I also participated in the writing of academic monographs such as "Social Aging" edited by Mr. Wu，The harvest is quite abundant。No exaggeration to say，I am learning、Every progress made in the field of elderly school cannot be separated from Mr. Wu's careful guidance，He is the leader of my academic research。

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Wish to know，Mr. Wu's long -term cultivation in China Population、Elderly academic circles，His academic output is more、Works, etc.，Works, etc.，Not only college scholars recognized in the domestic academic community，It is also an international population learning、Chinese scholars who have important influence in the elderly academic circles。As I saw what bet365 Play online games I saw，As elders and college scholars，Mr. Wu, whether it is to his peers or juniors，Give selfless help、Support and Guidance。One of my impressions of my impression is，More than 20 years ago，A friend who is familiar with the field of social security has concentrated on writing a new social security monograph for several years。She hadn't had much communication with Mr. Wu before，After finishing the manuscript, I contacted Mr. Wu very much，I hope he can give the new writing preface to the upcoming publishing。Mr. Wu did not hesitate to answer it，Submit a book order，The book is successfully published，and received general praise from the academic community。Every time I met this friend，She is grateful for Mr. Wu。Of course，All the younger who knows and familiar with Mr. Wu，Regardless of age、Qualification depth、Job height，Both have been carried by his elderly people to varying degrees，Also add color to the growth of these young people。

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For those who are unfamiliar with Mr. Wu，Mr. 邬 Rigidity、Stop at the best，Is the evergreen tree in the academic world。Actually，For the juniors who are familiar with Mr. Wu，His more valuable spiritual heritage is simple、Pacific approachable、kindness，It is the "old naughty boy" in our junior's minds。About the late 1990s，I didn't get into the year without confusion at that time，A chat with Mr. Wu, who was nearly 80th during the meeting，He asked me with concern: "Lao Lu，What are you doing recently? "I was sincere and fearful at the time，That is, every time I see Mr. Wu at that time，He always calls me "old land"。Mr. Wu was once a member of the Central Standing Committee of the Democratic League，I have also been a member of the Standing Committee of the National Committee of the Chinese People's Political Consultative Conference。Later, he learned through other channels that I was recommended Bet365 lotto review as a member of the CPPCC as a member of the 93rd members，Every time I meet, I always ask: "Lao Lu，What are the new proposals recently? "I also told me that I must learn diligently in the family of CPPCC、Qin Si、Do it、Diligence。

Ordinary Tao，The reason why a scholar is great，More than its great academic contribution，even more in virtue、With heart、The greatness of the realm。In my opinion，Mr. Wu whether it is academic or on character，All set up a monument that will always be looking up for the juniors。

　　(The author is a professor at the Department of Sociology at Peking University、Director of the National Strategy Research Center of Peking University)