| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>HP_Recieved_Check</fullName> | 
|     <active>true</active> | 
|     <errorConditionFormula>and(ischanged(Test_Element__c),isnull( HP_received_sign_day__c ))</errorConditionFormula> | 
|     <errorDisplayField>HP_received_sign_day__c</errorDisplayField> | 
|     <errorMessage>请填写用户装机日</errorMessage> | 
| </ValidationRule> |