On May 7, 2018, President Yankai Xia,Vice-President Guangfu Jin, Professor Jiangbo Du, Director of the FifthResearch Group attended the "Internal Meeting of the Fifth Research Groupof National Births" meeting. Professor Guangfu Jin represented NanjingMedical University Birth Cohort Research Center briefed the overall progress ofthe project, the existing problems and the next plan. The participantsexchanged and communicated on the problems existing in the Cohort operation,fully analyzed the problems and difficulties, put forward relevant solutionsand gathered consensus.