On the 18th November, 2017, an internalmeeting of the National Birth Cohort 2017 Summary Meeting was held in SuzhouConvention Center. More than 20 people attended the meeting, including PresidentHongbing Shen, Vice-President Zhibin Hu, President Yankai Xia, Director GuangfuJin, all the PI and the backbone, Professor Zhibin Hu On behalf of the BirthCohort Research Center of Nanjing Medical University, the participants briefedon the development of the birth cohort work, the construction results, theexisting problems and the next plan. The participants exchanged andcommunicated the problems existing in the cohort building, fully analyzed theproblems and difficulties, put forward relevant solutions and reachedconsensus.