统一社会信用代码校验

录入供应商、客户资料时，18 位信用代码经常抄错一位，等到开票或对账才发现。粘进来先校验一遍，错在哪一位、正确校验位是什么都能看到。 One mistyped character in an 18-digit credit code often surfaces only at invoicing or reconciliation. Check it here first and see which digit is wrong and what the correct check digit should be.

代码本身带信息：第 1 位是登记管理部门，第 2 位是机构类别，3 至 8 位是行政区划，后 9 位是主体标识码，页面右侧会一起拆开列出来。 The code carries structure: digit 1 is the registration authority, digit 2 the entity type, 3–8 the region code and the last 9 the organisation code, all listed on the right.