为丰富银联二维码产品形态、提升二维码业务与技术功能，在前期发布的2.5版技术指南基础上，银联联合主要成员机构对文档进行了修订并形成2.6版技术指南。

1 引用...........................................................................................................................................3
2 范围...........................................................................................................................................3
3 实施计划...................................................................................................................................4
4 改造点说明...............................................................................................................................5
4.1 字段属性调整...............................................................................................................5
4.1.1 merTransIndex 字段..........................................................................................5
4.1.2 acqAddnData、 issAddnData 字段 ...................................................................5
4.2 支持付款侧 C2B 消费同步应答 .................................................................................6
4.2.1 修订背景...........................................................................................................6
4.2.2 修订内容...........................................................................................................6
4.2.3 改造说明...........................................................................................................6
4.3 增加二维码动静态标识...............................................................................................7
4.3.1 修订背景...........................................................................................................7
4.3.2 修订内容...........................................................................................................7
4.3.3 改造说明...........................................................................................................7
4.4 查询订单及付款查询接口优化...................................................................................7
4.4.1 修订背景...........................................................................................................7
4.4.2 修订内容...........................................................................................................7
4.4.3 改造说明...........................................................................................................8
4.5 支持对公卡账户...........................................................................................................8
4.5.1 修订背景...........................................................................................................8
4.5.2 修订内容...........................................................................................................8
4.5.3 改造说明...........................................................................................................8
4.6 C2B 交易查询接口优化 ..............................................................................................9
4.6.1 修订背景...........................................................................................................9
4.6.2 修订内容...........................................................................................................9
4.6.3 改造说明...........................................................................................................9
4.7 增加商户英文名称.......................................................................................................9
4.7.1 修订背景...........................................................................................................9
4.7.2 修订内容...........................................................................................................9
4.7.3 改造说明...........................................................................................................9
4.8 支持国密算法.............................................................................................................10
4.8.1 修订背景.........................................................................................................10
4.8.2 修订内容.........................................................................................................10
4.8.3 改造说明.........................................................................................................10
4.9 银联侧证书更换.........................................................................................................10