Thanks for responding. ECM below:

--8<---------------cut here---------------start------------->8---
#+OPTIONS: f:t author:nil title:nil
* ch1
  text
** ch1-1
*** ch1-1-1[fn:1]
** ch1-2
*** ch1-2-1[fn:2]
* Footnotes

[fn:1]footnote 1

[fn:2]footnote 2
--8<---------------cut here---------------end--------------->8---

exports as Org buffer:

--8<---------------cut here---------------start------------->8---
# Created 2017-03-14 Tue 20:24
#+OPTIONS: f:t author:nil title:nil
* ch1
text
** ch1-1
*** ch1-1-1[fn:1]
** ch1-2
*** ch1-2-1[fn:2]

--8<---------------cut here---------------end--------------->8---

________________________________
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Sent: Sunday, March 12, 2017 6:36 PM
To: WY H
Cc: emacs-orgmode@gnu.org
Subject: Re: Bug: Missing footnotes when exporting to org file [9.0.5 (9.0.5-elpa @ ~/.emacs.d/elpa/org-20170210/)]

Hello,

WY H <jcjuly@outlook.com> writes:

> One issue's been annoying me recently though, when exporting org files
> with footnotes to org format, all the footnotes are missing in the result
> org file. This may not look like a common use case but when ox-pandoc
> comes to picture it is one, as ox-pandoc use org as an intermediate
> format for any conversion.

FWIW, I cannot reproduce it. Could you demonstrate the issue with an ECM?

Regards,

--
Nicolas Goaziou