User talk:Ruifang Zhang

May 2022
Hello, and welcome to Wikipedia! Thank you for your contributions; however, please remember the essential rule of respecting copyrights. Edits to Wikipedia, such as your edit to the page Marginal revenue, may not contain material from copyrighted sources unless used with permission. It is almost never okay to copy extensive text out of a book or website and paste it into a Wikipedia article with little or no alteration, though you can clearly and briefly quote copyrighted text in the right circumstances. Content that does not comply with this legal rule must be removed. For more information on this, see:
 * Copying text from other sources
 * Policy on copyright
 * Frequently asked questions on Wikipedia's copyright policy
 * Policy and guideline on non-free content

If you still have questions, there is the Teahouse, or you can and someone will be along to answer it shortly. As you get started, you may find the pages below to be helpful.


 * Introduction
 * Contributing to Wikipedia
 * The five pillars of Wikipedia
 * How to edit a page
 * How to create your first article
 * Simplified Manual of Style

I hope you enjoy editing Wikipedia! Please sign your name on talk pages using four tildes ( ~ ); this will automatically produce your name and the date. Feel free to write a note on the bottom of my talk page if you want to get in touch with me. Again, welcome! — Diannaa (talk) 14:13, 3 May 2022 (UTC)