Request_input_Rental_endo_date
    false
    AND(
OR(ISPICKVAL(demo_purpose2__c, "试用(无询价)"), ISPICKVAL(demo_purpose2__c, "试用(有询价)"), ISPICKVAL(demo_purpose2__c, "其他"), ISPICKVAL(demo_purpose2__c, "新产品评价"),
ISPICKVAL(demo_purpose2__c, "协议借用")
), 
ISBLANK(Request_return_day__c)) &&
NOT($User.Batch_User__c)
    Request_return_day__c
    "试用(无询价)","试用(有询价)","新产品评价","协议借用","其他"申请时,[预定归还日]是必填写