Using WS-Security, the client could sign the payment instructions to be sent to the banking system, preventing any modification to the intended payment amount by the merchant-system intermediary.
使用WS - Security，客户对发送给银行系统的付款指令进行签名，从而防止中间的商业系统随意修改指定的付款额。
If this Agreement has any modification, both parties must confirm the modified Agreement in a written form and sign supplementary terms.
如本协议有任何修改，须经双方书面确认，并签补充条款。
For any issue beyond this Contract and issue that needs change in execution of this Contract, both parties shall sign a modification agreement.
本合同的未尽事宜及本合同在履行过程中需变更的事宜，双方应通过订立变更协议进行约定。
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