Taking the People's Construction Bank of China as an example, according to the different preservation and utilization values of various loan projects, the preservation period of RMB loan files can be divided into three types. Where the national key construction projects, as well as construction projects with historical value of the loan files for permanent custody; The loan files of general large and medium-sized construction projects and technical transformation projects above designated size shall be kept for 10 ~ 20 years; The file retention period of small-scale construction projects, technical transformation projects below the quota and working capital loan projects is 1 ~ 5 years. The retention period of foreign exchange loan files shall be subject to the upper limit of the retention period of the corresponding RMB loan files. Article 7 of the Measures for the Administration of Loan Files of the People's Construction Bank of China According to the different preservation and utilization values of various loan projects, the preservation period of RMB loan files can be divided into three types. Where the national key construction projects, as well as construction projects with historical value of the loan files for permanent custody; The loan files of general large and medium-sized construction projects and technical transformation projects above designated size shall be kept for 10 ~ 20 years; The file retention period of small-scale construction projects, technical transformation projects below the quota and working capital loan projects is 1 ~ 5 years. The retention period of foreign exchange loan files shall be subject to the upper limit of the retention period of the corresponding RMB loan files.