update readme

Author: yztz

README.md

@@ -14,7 +14,8 @@
 > 1. 本软件不提供任何中转分发服务，发送行为直接关联您的SIM卡号码，属于您的个人通信范畴。
 > 2. 您的短信发送量、内容合规性及送达质量均受短信运营商的实时监控与限制。
 > 3. 本软件无法干预运营商的审查机制及计费标准。用户应对其发送内容的合法性及由此产生的法律后果负全部责任。
-> 4. 严禁利用本工具从事电信诈骗、垃圾信息传播等违法违规活动。
+> 4. 严禁利用本工具从事电信诈骗、垃圾信息传播等违法违规活动
+> 5. 本软件仅限于个人或企业内部合规通讯使用，严禁用于商业营销及各类广告投递。如需开展营销业务，请咨询具备相关资质的专业短信服务供应商
 
 ## 更新
 

README_EN.md

@@ -15,6 +15,7 @@ A lightweight bulk SMS application for the Android platform.
 > 2. The volume of messages sent, content compliance, and delivery rates are subject to real-time monitoring and restrictions imposed by your mobile network operator.
 > 3. This software cannot intervene in the operator's filtering mechanisms or billing standards. Users shall bear full legal responsibility for the legality of the content sent and any resulting consequences.
 > 4. It is strictly forbidden to use this tool for telecommunications fraud, the dissemination of spam, or any other illegal or non-compliant activities.
+> 5. This software is strictly intended for personal or internal corporate communications. Use for commercial marketing or advertising distribution is strictly prohibited. For marketing-related services, please consult a qualified professional SMS service provider.
 
 ## Updates