diff --git a/doc/source/internal/helpcenter_training/difference_gitea_github.rst b/doc/source/internal/helpcenter_training/difference_gitea_github.rst
index f2a8f07..8730f77 100644
--- a/doc/source/internal/helpcenter_training/difference_gitea_github.rst
+++ b/doc/source/internal/helpcenter_training/difference_gitea_github.rst
@@ -1,3 +1,46 @@
 =========================
 Difference Gitea / Github
-=========================
\ No newline at end of file
+=========================
+
+Due to the several requirements on Huawei and TSI side 2 gitops stages introduced. At first stage Huawei imports documentation to Gitea and TSI review and approve it.
+Afterwards documentation change is introduced to Github and TSI formally review it and approve.
+
+But there are few more differences which are described in the table below:
+
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| **Differences**                                    | **Gitea**                                          | **Github**                                         |
++====================================================+====================================================+====================================================+
+| Link                                               | https://gitea.eco.tsi-dev.otc-service.com/docs     | https://github.com/opentelekomcloud-docs/          |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Environment                                        | PREPROD                                            | PROD                                               |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+|                                                    | internal                                           | public                                             |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Who can introduce changes                          | Huawei                                             | Anyone (TSI, Huawei, customer)                     |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Source of documentation                            | Huawei                                             | TSI+Huawei                                         |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Form of change                                     | Sync                                               | Diff                                               |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Portal                                             | https://docs-int.otc-service.com                   | https://docs.otc.t-systems.com                     |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Document types                                     | -  UMN, API, DEV, other public facing documents    | -  UMN, API, DEV, other public facing documents    |
+|                                                    |                                                    |                                                    |
+|                                                    | -  PD, HLD, CDR, other internal documents          |                                                    |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+| Stages                                             | 1. Import of the documentation change by Huawei in | 1. Review of the documentation change in target    |
+|                                                    |    doc-exports repo (html)                         |    document repository                             |
+|                                                    |                                                    |                                                    |
+|                                                    | 2. Conversion of the documentation to target       | 2. Resolve potential conflicts                     |
+|                                                    |    document repository (rst)                       |                                                    |
+|                                                    |                                                    | 3. Approve and gate documentation change in target |
+|                                                    | 3. Review of the documentation change in target    |    document repository                             |
+|                                                    |    document repository                             |                                                    |
+|                                                    |                                                    |                                                    |
+|                                                    | 4. Approve and gate documentation change in target |                                                    |
+|                                                    |    document repository                             |                                                    |
+|                                                    |                                                    |                                                    |
+|                                                    | 5. Approve and gate documentation change in        |                                                    |
+|                                                    |    doc-exports repo                                |                                                    |
++----------------------------------------------------+----------------------------------------------------+----------------------------------------------------+
+