text:  In 1644 , Hu took it upon himself to create a new Imperial seal for the <unk> Emperor , which he carved after a period of fasting and prayer . He presented his creation with an essay , the Great Exhortation of the Seal ( <unk> Zhen , <unk> ) , in which he bemoaned the loss of the Chongzhen Emperor 's seal and begged Heaven 's favour in restoring it . Hu was concerned that his essay would be overlooked because he had not written it in the form of rhyming , equally @-@ footed couplets ( <unk> , <unk> ) used in the Imperial examinations , but his submission and the seal itself were nevertheless both accepted by the Southern Ming court . 
  