def get_detail_images(self, content_id):
        """
        Inquire detail images

        :param content_id: Content ID to inquire
        :type content_id: str

        :rtype: list
        """
        resp = json.loads(urlopen(self.additional_images_url.format(content_id, 1)).read().decode('utf-8'))
        total_count = resp['response']['body']['totalCount']
        # Get total count

        resp = json.loads(urlopen(self.additional_images_url.format(content_id, total_count)).read().decode('utf-8'))
        try:
            data = resp['response']['body']['items']['item']
            # Extract data list
            if type(data) is dict:
                data.pop('contentid', None)
                data.pop('serialnum', None)
                data['origin'] = data.pop('originimgurl', None)
                data['small'] = data.pop('smallimageurl', None)
                # Manufacture
            else:
                for img in data:
                    if type(img) is dict:
                        img.pop('contentid', None)
                        img.pop('serialnum', None)
                        img['origin'] = img.pop('originimgurl', None)
                        img['small'] = img.pop('smallimageurl', None)
                        # Manufacture
                    else:
                        del img

            return data if type(data) is list else [data]
        except TypeError:
            return None
Inquire detail images

        :param content_id: Content ID to inquire
        :type content_id: str

        :rtype: list