湖南省邮政局、省质量技监局联合做出决定:于 2003年10月1日在全国率先推行条码防伪信封,要求 所有印制的信封必须在背面加印二维防伪条形码,并且 在印制前必须经过邮政行业管理部门审批,并获取分配 的条码。27位的防伪密码由省邮政行政部门统一管理。 Hunan Provincial Bureau of Post and the Provincial Bureau of Quality and Technical Supervision jointly made the decision: On October 1, 2003, the first in the country to implement bar code security envelopes, requiring all printed envelopes must be printed on the back of the two-dimensional security bar code, and before printing It must be approved by the postal administrative department and obtain the assigned barcode. 27-bit security password by the provincial postal administration unified management.