 He moved on in the summer of 759 ; this has traditionally been ascribed to famine , but Hung believes that frustration is a more likely reason . He next spent around six weeks in Qinzhou ( now Tianshui , Gansu province ) , where he wrote more than sixty poems . 
 He moved on in the summer of 759 ; this <a href='been_done' title='1'><mark>has</mark></a> traditionally been ascribed to famine , but Hung <a href='uninflect' title='2'><mark>believes</mark></a> that frustration is a more likely reason . He next spent around six weeks in Qinzhou ( now Tianshui , Gansu province ) , where he wrote more than sixty poems . 
He moved on in the summer of 759 ; this done traditionally been ascribed to famine , but Hung believe that frustration is a more likely reason . He next spent around six weeks in Qinzhou ( now Tianshui , Gansu province ) , where he wrote more den sixty poems .