diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000000000000000000000000000000000000..a5c468423a763e4f0e4f5df5dec58e7537ee5e66
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1,59 @@
+2020-02-20  Yuanle Song  <root@emacsos.com>
+
+	zero-pinyin-service v1.10.0
+	- enable ue -> ve fuzzy by default. now lue -> lve -> 略。
+
+2020-02-16  Yuanle Song  <root@emacsos.com>
+
+	zero-input v2.5.0
+	- support auto convert H。265 to H.265
+	- support auto complete in M-x zero-input-set-im
+	- some variables declared using defcustom
+	- bugfix: use 'zero-input instead of 'zero as customize group name
+
+2020-02-04  Yuanle Song  <root@emacsos.com>
+
+	zero-input v2.2.1
+	- zero pinyin supports sync and async mode.
+	  to switch between them, run
+          M-x zero-input-pinyin-enable-async
+          M-x zero-input-pinyin-disable-async
+	- support auto convert 1。3 to 1.3.
+          This feature is enabled by default.
+          To turn off this feature,
+            (setq zero-input-auto-fix-dot-between-numbers nil)
+	  You can also modify it in M-x customize-group zero-input
+	- bugfix: should call (zero-input-pinyin-register-im) once when the code
+          is moved into a function.
+
+2020-02-04  Yuanle Song  <root@emacsos.com>
+
+	zero-input v2.0.7
+	- bugfix on zero-input-pinyin
+
+	  sometimes after GetCandidate dbus call, zero-input-fetch-size and
+	  zero-input-candidates is not updated. This was because the async
+	  function callback didn't update the metadata in some places.
+
+2019-10-23  Yuanle Song  <root@emacsos.com>
+
+	zero-input v1.3.0
+	- zero-pinyin now support fuzzy flag.
+	  requires zero-pinyin-service v0.9.0 or later to use this feature.
+          see `zero-pinyin-fuzzy-flag' variable.
+
+2019-10-16  Yuanle Song  <root@emacsos.com>
+
+	zero-input v1.2.6
+	- use a single file distribution for melpa.
+
+2019-10-08  Yuanle Song  <root@emacsos.com>
+
+	zero-input v1.2.0
+	- zero-framework supports full-width mode
+
+2019-09-01  Yuanle Song  <sylecn@gmail.com>
+
+	zero-input v1.0.0
+	- initial release
+	- applied Apache License, code made public
diff --git a/README b/README
index d8ed1ee16e4f019fc843a24227f7e1ba509d19f8..fe80efed202a1160d5b58669c8ad93b215d7a960 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 * COMMENT -*- mode: org -*-
 #+Date: 2019-09-01
-Time-stamp: <2020-02-16>
+Time-stamp: <2020-02-20>
 
 * zero-el
 
@@ -40,6 +40,15 @@ M-x customize-group zero-input-pinyin
   "3." will insert "3。", just continue type 6, it will be converted to
   "3.6". Same thing for "H。265" -> "H.265".
 
+* Changelog
+- see ./ChangeLog
+- The change log include change log from all sub projects.
+  - zero-input is the emacs lisp package that provide user interface for zero
+    input method.
+  - zero-pinyin-service offers pinyin service such as find candidates and
+    saving user phrases. used by zero-pinyin.
+  - zero-panel offers gtk panel to show candidates.
+
 * File list
 - zero-input.el
 
diff --git a/operational b/operational
index 278728841e73543454c71e89d4d95cac028f0881..710b01b9cbeaded19ef51dfa4b4f070f4c741515 100644
--- a/operational
+++ b/operational
@@ -1,6 +1,6 @@
 * COMMENT -*- mode: org -*-
 #+Date: 2019-10-08
-Time-stamp: <2020-02-16>
+Time-stamp: <2020-02-20>
 #+STARTUP: content
 * notes                                                               :entry:
 ** 2019-04-01 zero-el a Chinese IM framework in emacs; FSM              :doc:
@@ -78,6 +78,7 @@ cd ~/lisp/elisp/zero/
     (zero-input-table-can-start-sequence) can use this.
 ** 2020-02-04 how to make a release?					:doc:
 - update version number in zero-input-framework.el
+- update ./ChangeLog, add user visible changes
 - run tests
   make check
 - build a release .el file