Hello, Wangtao626! Welcome to Wikipedia! It appears that you are here to participate in a class project. If you haven't done so already, we encourage you to go through our training for students. Click here for the online training for students

If you need help, check out Wikipedia's page for questions. You can also ask me by visiting my user talk page and leaving a message, or you can ask your question on this page by editing it and placing {{Help me}} before your question. Please make sure that you sign your messages on discussion pages, which is done by entering four tildes (~~~~) at the very end of it; this will automatically insert your username and the date. I also highly recommend that you review the advice for students page.

Before you create an article, make sure that you understand what kind of articles are accepted here. Remember: Wikipedia is an encyclopedia, and while many topics are encyclopedic, some things are not.

Your instructor or professor may wish to set up a course page, and if your class doesn't already have one, please tell your instructor about creating one. It is highly recommended that you place this text: {{Educational assignment}} on the talk page of any articles you are working on as part of your Wikipedia-related course assignment. This will let other editors know that the article is a subject of an educational assignment as well as aid your communication with them.

Here are some more pages that you might find helpful:

• The five pillars of Wikipedia
• How to edit a page (editing policy)
• Introduction to Wikipedia
• Help pages index
• Visual editor tutorial
• Wikitext tutorial (if you're choosing to edit pages using the Wikitext source code instead of the VisualEditor)
• Wikitext cheatsheet

While editing:

• Maintain a neutral point of view – this is one of Wikipedia's core policies.
• Be bold, but do not add troublesome content to any article, such as: copyrighted text, libel, advertising or promotional messages, and text that is not related to an article's subject; doing so will result in your account or IP being blocked from editing.
• Respect copyrights – do not copy and paste text or images directly from other websites.
• No edit warring or abuse of multiple accounts.
• Provide reliable sources to the content you add. If you are adding biomedical information, please follow this guideline.
• Take particular care while adding biographical material about a living person to any Wikipedia page and follow Wikipedia's Biography of Living Persons policy. Particularly, controversial and negative statements should be referenced with multiple reliable sources.
• If you are testing, please use the Sandbox to .

We hope you like it here and encourage you to stay even after your assignment is finished!