=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Tue, 30 Nov 2021 12:17:44 GMT
Content-Type: text/html
Content-Length: 162
Connection: close
Location: https://u-site.jp/survey/200006.html

HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Tue, 30 Nov 2021 12:17:44 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Expires: Tue, 30 Nov 2021 13:17:44 GMT
Cache-Control: max-age=3600
X-Redirect-By: redirection
Location: /survey/200006

HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Tue, 30 Nov 2021 12:17:44 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Expires: Tue, 30 Nov 2021 13:17:44 GMT
Cache-Control: max-age=3600
X-Redirect-By: WordPress
Location: https://u-site.jp/lecture/20000601

HTTP/1.1 200 OK
Server: nginx
Date: Tue, 30 Nov 2021 12:17:45 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Link: &lt;https://u-site.jp/?p=1547&gt;; rel=shortlink

Request headers
================
HEAD /lecture/20000601 HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: u-site.jp
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.