October 14-18, 2009 annual meeting of Campbell collaboration network, a grand international event in the field of evidence-based social science research: what works global summit 2019 was held in Mexico City, Mexico, attended by more than 500 representatives from more than 30 countries and regions around the world. Yang kehu, Wei Lili, Si Lijuan and Li Xiuxia from the evidence-based social science research center of our university led graduate students Zhang Jing, Yang Ying, Hou Yuqi, Li Yanfei, Li Rui, he Wenbo, Zhang Weiyi, Cao liujiao, Hou Liangying and Li Huijuan to attend the meeting.

Professor Howard, CEO of Campbell collaboration network and Professor Vivian, chief editor of Campbell Library

There are 3 theme reports, 23 workshops, 17 special meetings and 127 presentations. In addition, the conference selected 30 papers for wall newspaper display and communication. Eighteen papers from the evidence-based social science research center of Lanzhou University were accepted by the conference. Among them, graduate students Li Rui and Cao liujiao made the introduction rates of child abuse in China: a systematic review and meta analysis and meta analysis on the intervention effect of signing the family doctor service mode at higher risk of chronic diseases in the conference 16 papers were publicized and exchanged in the wall newspaper.

The conference conducted extensive and in-depth discussions on evidence production, evidence evaluation, evidence transformation and application in the fields of education, economy, health, environment, legislation, poverty reduction, social welfare, food safety, management decision-making, international development, etc. In particular, Robert Rogers and his colleagues from the 2019 Nobel Prize winner in economics, abhijit v. Banerjee Laboratory (j-pal), attended the meeting and introduced their research results, which aroused great interest from teachers Wei Lili and Si Lijuan, and shared with Robert Rogers and his party had further in-depth exchanges and reached a preliminary intention on cooperation in scientific research, personnel training and academic exchanges.

During the meeting, Yang kehu and Professor Jeremy Grimshaw, chairman of Cambell collaboration network, Professor Howard white, CEO and Vivian, chief editor of Cambell collaboration network Professor Welch exchanged views on further strengthening cooperative research, academic exchanges and personnel training between the evidence-based social science research center of Lanzhou University and the Campbell collaboration network, discussed the ongoing cooperative research projects, and discussed Li Xiuxia's plan to study in the Campbell collaboration network collaboration unit, University of London, UK. At the same time, Professor Howard happily accepted our invitation and will visit Lanzhou University from November 17 to 21, 2019.

Teachers and students of Lanzhou University and Professor Jeremy Grimshaw, chairman of Campbell collaboration network

This conference is the one with the largest number of participants (14) and the largest number of papers (18) since the establishment of the evidence-based social science research center of our university. In particular, the propaganda of 16 wall newspapers by teachers and students of Lanzhou University left a profound impact on the experts. After the meeting, Professor Jeremy Grimshaw, chairman of Campbell collaboration network, said in an email on October 23: there was a very strong contigent from Lanzhou University at the what works Global Summit (Campbell meeting) in Mexico City. Professor Vivian, chief editor of Campbell collaboration network, also commented in the email: "it was very happy to see so many from Lanzhou University at wwgs in Mexico - your presentations were a huge highlight they were all fantastic!"

Taking this conference as an opportunity, the research center of evidence-based social sciences will adhere to the development concept of learning from the first class, doing first-class research and producing first-class results, and make persistent efforts to build a unique research base of cross innovation of evidence-based Social Sciences and an exchange platform for international cooperation and development, so as to promote the rapid development of evidence-based Social Sciences and speed up the entry of the general introduction of social sciences into the ESI world The top 1% of the process.