On table purchReqTable,

create new method and add this

display public server Name aiDepartment()
{
    return HcmWorker::find(this.Originator).primaryDepartmentName();
}

on form PurchReqTableListPage, right click and choose Restore (to restore DataSource).
and add string to Grid, set datasource and method on properties.

voila !! done..

happy Daxing… !!