User talk:RaysShen

February 2010
Welcome to Wikipedia. The recent edit that you made to the page Covalent bond has been reverted, as it appears to be unconstructive. Please use the sandbox for testing any edits; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing for further information. Thank you.  Tide  rolls  01:29, 16 February 2010 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did with this edit to the page Covalent bond. Such edits constitute vandalism and are reverted. Please do not continue to make unconstructive edits to pages; use the sandbox for testing. Thank you.  Tide  rolls  01:30, 16 February 2010 (UTC)

Welcome to Wikipedia. Although everyone is welcome to contribute to Wikipedia, at least one of your recent edits did not appear to be constructive and has been reverted. Please use the sandbox for any test edits you would like to make, and read the welcome page to learn more about contributing constructively to this encyclopedia. Thank you. RobertMel (talk) 01:30, 16 February 2010 (UTC)