User talk:Sharkyangliu

Hello, I'm Materialscientist. I wanted to let you know that I undid one or more of your recent contributions because it appeared to be promotional. Advertising and using Wikipedia as a "soapbox" are against Wikipedia policy and not permitted. Take a look at the welcome page to learn more about Wikipedia. Thank you. Materialscientist (talk) 23:58, 8 December 2013 (UTC)