"History of Chinese bet365 premier league odds Science and Technology" edited by Liang Jiamian，is the most comprehensive so far、The most systematic general history of Chinese bet365 premier league odds science and technology，After publication, it received unanimous praise from domestic and foreign academic circles。The preparation of this book was conceived as early as 1965 when the Propaganda Department of the Central Committee of the Communist Party of China held a meeting to compile the "History of Science and Technology in China" in Dalian。December 1978，The Ministry of Agriculture and Forestry in the form of (78) Agriculture and Forestry (Science and Education) No. 68，Deployment writing work。March 1979，The Ministry of Agriculture and Forestry commissioned the Chinese Academy of bet365 premier league odds Sciences to hold the first writing meeting in Zhengzhou，Established an editorial committee with Lin Shan as the chairman and a writing committee with Liang Jiamian as the chief editor，Constituted a writing team of more than 40 bet365 premier league odds history experts。About this meeting，There is no explanation of the scholar’s ​​composition yet。The author refers to the relevant materials stored in Yang Kuan’s manuscript，Just Yang Kuan、A brief explanation of Hu Daojing’s participation in the meeting，To enrich our understanding of this meeting，It can also enrich our understanding of the details of the preparation process of "Manuscript of the History of Chinese bet365 premier league odds Science and Technology"。

Many scholars were invited to this conference，Distribute the prepared outline to relevant scholars in advance。Yang Kuan is among those invited，Maybe due to busy work，He was unable to attend the meeting in person，Please ask my friend Hu Daojing to bring his four opinions to the participating scholars，For reference。He made four comments on the outline，First, the division of stages in the history of science and technology，The second is how to properly explain the relationship between the development bet365 premier league odds and technology, the development of productivity and agricultural policies at that time，The third is the relationship between the development bet365 premier league odds and technology and the social and economic development of various regions in different periods and how to highlight the key points，Fourth is to promote the academic style of seeking truth from facts。The excerpt of the draft opinion is as follows:

Judging from the entire outline，bet365 premier league odds comprehensive and thoughtful。I am just following the requirements of historians，Propose some preliminary opinions，Provide reference。

(1) The question of how to divide the history bet365 premier league odds and technology into stages

I hope this book is written，We must take into account the stage of social development in our country，It is more necessary to divide the stages according to the characteristics of the development bet365 premier league odds and technology history。It must reflect the general laws of social development，It is more important to express the special laws of the development bet365 premier league odds and technology，So that readers can see the main characteristics of the development bet365 premier league odds and technology in various periods，You can also see the important role that the development bet365 premier league odds and technology at that time played in the development of social history。

The current third part of this outline takes the Spring and Autumn Period and the Warring States Period as a stage，It can be discussed。The current periodization of ancient Chinese history，There are still different opinions in the academic community，But the Spring and Autumn Period、The Warring States Period was a period of major transformation，The opinions are still the same，In other words, the transition from slavery to feudalism，In other words, it is changing from a feudal system to a landlord system。The development of bet365 premier league odds productivity，Including the development of bet365 premier league odds production technology at that time，is an important factor in promoting this change。Now the Spring and Autumn Period and the Warring States Period are divided into one stage，It’s hard to see how it relates to this transition。Title of this section: "Agriculture and Intensive Farming Technology during the Spring and Autumn and Warring States Periods"，In fact, intensive farming was not possible before the mid-Spring and Autumn Period。This part starts with "The Widespread Use of Iron Farm Tools"，In fact, this was not done in the Spring and Autumn Period。And there is a lack of information on this in the Spring and Autumn Period，Written together during the Warring States Period，Very difficult，Incongruous。

The fourth part takes the Qin and Han Dynasties to the Southern and Northern Dynasties as one stage，Part 5 takes the Sui, Tang, Song and Yuan Dynasties as one stage，Both stages are eight hundred years old，It seems too long。Divide long stages like bet365 premier league odds，It is difficult to write about the characteristics of each era，Is it possible to shorten the time of dividing the stages appropriately。

(2) How to properly explain the relationship between the development bet365 premier league odds and technology, the development of productivity and agricultural policies at that time

In the past, there was insufficient research on the relationship between agricultural policies and the development of agricultural production technology in various periods，This outline pays attention to this point，It’s very good。I think it is appropriate to explain and explain this aspect，Very necessary。For example, the recuperation policy implemented by the landlord regime in some early dynasties，What role does it play in the development of agricultural production and agricultural science，Needs proper explanation。In the past, the impact bet365 premier league odds and technology on the development of productivity in various eras and even the entire social and economic development，Research is not enough。We often just talk about technology，Dare not emphasize its role。Of course it is difficult to explain its function in detail，But you can also use some specific information to explain。For example, the growth of household registration and household registration controlled by the state in a certain period，It also specifically reflects the results of the restoration and development of agricultural production under a relatively stable society at that time，This should also have something to do with the development of agricultural production technology at that time。

(3) The relationship between the development bet365 premier league odds and technology and the social and economic development of various regions in different periods and how to highlight key issues

The development of agricultural economy in various regions in the history of our country is unbalanced。Due to different natural conditions and historical conditions in various regions，The development of agricultural production and agricultural science and technology also have different characteristics。Sometimes this area is more advanced，Sometimes that area is more advanced，Sometimes a certain agricultural crop has special development in a certain area。How to highlight the advanced technology of certain regions in a certain period，Describe outstanding achievements in cultivating a certain crop，Highlight the key points，I think it is necessary。For example, the production technology of rice and cotton in the Jiangnan region after the Song and Yuan Dynasties，Should be one of the focuses of this period。At the same time，The decline of the agricultural economy in some areas and the rise of the agricultural economy in some areas，Influence on the development bet365 premier league odds，It should also be explained appropriately。For example, the Yangtze River Basin, especially the Jiangnan area，How agricultural production gradually increases，Why did production in the South surpass that of the North after the Sui and Tang Dynasties，How to achieve greater development in agricultural production technology，All should be explained appropriately。I think we can consider highlighting some key points in this book，Especially highlight the development of more important crop production technologies。If only comprehensive care is taken，And ignore the key points，It is not easy for readers to understand deeply，At the same time, it is not easy for this work to have a significant impact。

(4) The issue of advocating the academic style of seeking truth bet365 premier league odds facts

As a general history of a certain technology，Need to summarize previous research results and make a high-level summary。Necessary ancient documents must be cited，We must also make appropriate evaluations bet365 premier league odds important results obtained by previous research，Then absorb and melt。It is impossible to explain this aspect in the text，Is it possible to add a small note appropriately。This way we respect the fruits bet365 premier league odds labor of our predecessors，It also facilitates readers to further study。The same should be true for the research results of foreign scholars。Some popular books or papers written in the past，Eradicate previous research results，Plagiarism，Not paying attention to the source，This bad style of study must be corrected。

The above four bet365 premier league odds，Just a personal thought，Not necessarily advisable，Please correct me。

The meeting will start discussion on March 5th，Ends on the afternoon of March 9th。That night，Hu Daojing returns to Shanghai。Due to busy work and tired travel，Hu Daojing failed to come to Yang Kuan in person to explain the meeting，Therefore，Written a letter on March 11 to inform Yang Kuan bet365 premier league odds meeting。The letter is as follows:

bet365 premier league odds Kuanzheng:

The bet365 premier league odds History Conference spoke highly of your comments on the outline，Printed and distributed to comrades participating in the discussion。During discussion on March 5th，Adopted your specific opinions on phasing，Divide the Spring and Autumn Period and the Warring States Period；Made appropriate divisions into the centralized feudal period。Other opinions are also accepted。The conference team would like to thank you。

Visited the Neolithic cultural site (Dahecun site) excavated in the suburbs of Zhengzhou，Charcoal grains，According to the determination bet365 premier league odds Institute of Botany, it is millet。In the Provincial Museum warehouse, we also visited the newly discovered sedan relics found near the tomb bet365 premier league odds Warring States Period in the Mall (High 1.8—2.0 meters)，The main tomb has not yet been excavated，It is speculated to be the tomb of Sun Shuao，The name bet365 premier league odds small place is Hou Guodui。

End of the afternoon meeting on the 9th。Take a flight from Xi'an at 4 o'clock and return to Shanghai at 8:30 pm。very busy and sleepy，Today I still can’t come to visit my brother and sister-in-law，Reporting situation，I’ll give you a rough report first。Also enclose 2 printed copies of your opinions，Outline proposed by Professor Liang Jiamian, Director of the bet365 premier league odds History Research Office of South China bet365 premier league odds College (not adopted，But absorbed some of his suggestions)，And Wang Yunlao, an expert in soil and geology (82 years old this year，Also participated in the meeting) A copy of the paper。

bet365 premier league odds news about the recorder，I asked Comrade Jin Yuan yesterday，Still waiting。Praise

Double blessings, and to

Greetings, Mr. Bo

bet365 premier league odds Dao Jing 1979.3.11

bet365 premier league odds letter was written at noon，After the letter is sent，Hu Daojing remembered that there were still three things that he could not tell。Write another postcard at midnight that day，Word:

Brother bet365 premier league odds Zheng:

Sent a letter this afternoon，There are still three things I have forgotten to report: (1) The bet365 premier league odds Heritage Research Office of the Academy of bet365 premier league odds Sciences (Nanjing) was dismantled by the "Gang of Four"，Decentralized personnel，All destroyed。The Academy of bet365 premier league odds Sciences is now applying to the Ministry of Agriculture for reconstruction，will be changed to all，The name will also be changed to the Institute of History of bet365 premier league odds Technology，The site will still be built in Nanjing。(2) The Zhengzhou Conference unanimously initiated the establishment of a society (Society for the History of bet365 premier league odds Technology)。After the establishment of the Society，bet365 premier league odds history scholars from all over the country will be invited to participate。(3) The Archaeological Conference (National) will be held in Xi’an in July。Shun Song

Double safety!

Di Daojing

　1979.3.11 midnight

In short，Although Yang Kuan cannot attend the meeting in person，But out of scholar’s ​​responsibility，Proposed four reference points，And please bring Hu Daojing to the conference。Hu Daojing sent two letters in succession to inform Yang Kuan of the meeting，This shows his solemnity in entrusting Yang Kuan。It can also be seen from this，Behind the publication of a collective work，Except for actual participating workers，There must be many like Yang Kuan、An unknown scholar like Hu Daojing，Their concern and opinions on the "History of Chinese bet365 premier league odds Science and Technology" are worth remembering。

　　(This article is a phased result bet365 premier league odds National Social Science Fund general project "Yang Kuan and Chinese History Research in the 20th Century" (20BZS006))

(Author’s unit: School of bet365 premier league odds, Yan’an University)