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				@@ -1231,7 +1231,13 @@ public class TeacherServiceImpl extends ServiceImpl<TeacherDao, Teacher> impleme 
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				     } 
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				     private void sendBindUnBindSMS(Long userId, String phone, MessageTypeEnum messageType, Long tenantId) { 
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				+        if (tenantId == null ){ 
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				+            return; 
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				+        } 
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				         TenantInfo tenantInfo = tenantInfoService.getById(tenantId); 
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				+        if (tenantInfo == null) { 
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				+            return; 
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				+        } 
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				         Map<Long, String> receivers = new HashMap<>(); 
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				         receivers.put(userId, phone); 
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				         sysMessageService.batchSendMessage(MessageSenderPluginContext.MessageSender.AWSMS, messageType, 
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