GEOLOGY IN CHINA Dataset of Present Status, Supply and Demand, and Import-Export Volume of Important Metal Mineral Resources in China Import-Export Volume of china Among the six sheets, Resources in the World, Identified Resource Reserves in China, and Reserves Base in China consist of serial number, mineral type, ore type, unit, reserves per year (2006-2016), and data source(Table 2) Raw Ore Production in China and Raw Ore Consumption in China include mineral type ore type, unit, production per year(2007-2017), data source, and remarks(Table 3) Import-Export Volume of China includes serial number, mineral type, ore type, unit, year (2007-2017), import volume, import amount, export volume, export amount, and data source (Table 4) 4 Data Quality Control and Assessment During data extraction and analysis, the data of the same category were collected from a unified source as far as possible in order to ensure the overall consistency of the data. Among the data, the resources and reserves were mainly extracted from the yearbooks and reports issued by the Natural Resources of the Peoples Republic of China and the USGs. The production data came from the USGS. However, the production of some metal minerals in recent years was the predicted data issued officially since the update of the official data was delayed. It was difficult to collect consumption data since no unified official release sources were available. The main resources of consumption data were the data issued on the websites of various industries. The trade data came from the accumulated values of the monthly data eleased by the General Administration of Customs, P. R. China and, therefore, the data was credible. To keep high quality of the data, the updating and maintenance mechanism of the dataset must be guaranteed in the future, so that the data can be compared with the latest data eleased and can then be updated in time In the mid-term quality inspection and final result acceptance organized by the Development and Research Center of China Geological Survey, the dataset was approved by the expert group and thought to be clear and credible in terms of data sources and data quality 5 Conclusions (1) The dataset of important metal minerals contains all the resources, production, consumption and trade data of 16 important metal minerals from 2006 to 2017, with a total of 1 457 data items being collected. During the data collection, self-check was conducted for all data and 30% of the data were further checked by people other than data collectors so as to verify the data results. Once any errors were found by these people, related data would be modified and the self-check process would be initiated again. The data would thus be checked epeatedly until all data of the dataset are verified correctly without any errors. The dataset ha passed through expert review and is thought to be clear and credible in terms of data sources and data quali (2)The following information is shown according to data analysis. In terms of bulk minerals in short supply such as iron Fe, manganese Mn, copper Cu, and gold Au, although 148http://geodb.cgsgov.cnGeoloGyInChinA2019,Vol.46Supp.(1)Import–Export Volume of China. Among the six sheets, Resources in the World, Identified Resource Reserves in China, and Reserves Base in China consist of serial number, mineral type, ore type, unit, reserves per year (2006−2016), and data source (Table 2). Raw Ore Production in China and Raw Ore Consumption in China include mineral type, ore type, unit, production per year (2007−2017), data source, and remarks (Table 3). Import–Export Volume of China includes serial number, mineral type, ore type, unit, year (2007−2017), import volume, import amount, export volume, export amount, and data source (Table 4). 4    Data Quality Control and Assessment During data extraction and analysis, the data of the same category were collected from a unified source as far as possible in order to ensure the overall consistency of the data. Among the  data,  the  resources  and  reserves  were  mainly  extracted  from  the  yearbooks  and  reports issued  by  the  Natural  Resources  of  the  People’s  Republic  of  China  and  the  USGS.  The production  data  came  from  the  USGS.  However,  the  production  of  some  metal  minerals  in recent years was the predicted data issued officially since the update of the official data was delayed. It was difficult to collect consumption data since no unified official release sources were available. The main resources of consumption data were the data issued on the websites of various industries. The trade data came from the accumulated values of the monthly data released by the General Administration of Customs, P. R. China and, therefore, the data was credible.  To  keep  high  quality  of  the  data,  the  updating  and  maintenance  mechanism  of  the dataset must be guaranteed in the future, so that the data can be compared with the latest data released and can then be updated in time. In  the  mid-term  quality  inspection  and  final  result  acceptance  organized  by  the Development and Research Center of China Geological Survey, the dataset was approved by the expert group and thought to be clear and credible in terms of data sources and data quality. 5    Conclusions (1)  The  dataset  of  important  metal  minerals  contains  all  the  resources,  production, consumption and trade data of 16 important metal minerals from 2006 to 2017, with a total of 1 457  data  items  being  collected.  During  the  data  collection,  self-check  was  conducted  for  all data and 30% of the data were further checked by people other than data collectors so as to verify  the  data  results.  Once  any  errors  were  found  by  these  people,  related  data  would  be modified and the self-check process would be initiated again. The data would thus be checked repeatedly until all data of the dataset are verified correctly without any errors. The dataset has passed through expert review and is thought to be clear and credible in terms of data sources and data quality. (2)  The  following  information  is  shown  according  to  data  analysis.  In  terms  of  bulk minerals in short supply such as iron Fe, manganese Mn, copper Cu, and gold Au, although GEOLOGY IN CHINA Dataset of Present Status, Supply and Demand, and Import-Export Volume of Important Metal Mineral Resources in China 148 | http://geodb.cgs.gov.cn GEOLOGY IN CHINA 2019, Vol.46 Supp.(1)