User talk:190.42.200.45

June 2010
Please do not delete content or templates from pages on Wikipedia, as you did to Black–Scholes, without giving a valid reason for the removal in the edit summary. Your content removal does not appear constructive, and has been reverted. Please make use of the sandbox if you'd like to experiment with test edits. Thank you. Etrigan (talk) 17:04, 21 June 2010 (UTC)
 * If this is a shared IP address, and you didn't make any unconstructive edits, consider creating an account for yourself so you can avoid further irrelevant warnings.

September 2020
Hello, I'm Materialscientist. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Dynasties in Chinese history—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks. Materialscientist (talk) 14:13, 18 September 2020 (UTC)
 * If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

Please refrain from making test edits in Wikipedia pages, even if you intend to fix them later. Your edits have been reverted. If you would like to experiment again, please use the sandbox. Thank you. Materialscientist (talk) 14:14, 18 September 2020 (UTC)