User talk:Roberto Salazar 20

January 2017
Hello, I'm Materialscientist. I wanted to let you know that one or more of your recent contributions to Ahn Sahng-hong have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page. Materialscientist (talk) 05:49, 2 January 2017 (UTC)