| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>CheckChangeReason</fullName> | 
|     <active>true</active> | 
|     <errorConditionFormula>ISBLANK(ChangeReason__c)</errorConditionFormula> | 
|     <errorDisplayField>ChangeReason__c</errorDisplayField> | 
|     <errorMessage>至少选择一项客户变更理由!</errorMessage> | 
| </ValidationRule> |