User talk:Duc123456

February 2020
Please do not remove content or templates from pages on Wikipedia without giving a valid reason for the removal in the edit summary. Your content removal does not appear to be constructive and has been reverted. If you only meant to make a test edit, please use the sandbox for that. Thank you. Crboyer (talk) 20:33, 14 February 2020 (UTC)

You have been blocked indefinitely from editing for abuse of editing privileges. If you think there are good reasons for being unblocked, please read the guide to appealing blocks, then add the following text below the block notice on your talk page:. Materialscientist (talk) 14:21, 14 October 2020 (UTC)