User talk:Pingwu2011

Hello, I'm Materialscientist. I wanted to let you know that one or more of your recent contributions have been undone because they appeared to be promotional. Advertising and using Wikipedia as a "soapbox" are against Wikipedia policy and not permitted; Wikipedia articles are written objectively and from a neutral perspective. Take a look at the welcome page to learn more about Wikipedia. Thank you. Materialscientist (talk) 09:59, 6 July 2017 (UTC)