User talk:Yjwang.chem

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Hello, Yjwang.chem, and welcome to Wikipedia! Thank you for your contributions. I hope you are enjoying editing and want to do lots more. Some useful pages to visit are:
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If you need any help, check out Questions, ask me on my talk page, or ask your question on this page and then place  before the question. We're so glad you're here! All the best: Rich Farmbrough, 23:30, 27 April 2015 (UTC).