Hello, Jihaiyun! Welcome to Wikipedia! It appears that you are here to participate in a class project. If you haven't done so already, we highly encourage you to go through our training page that's specifically created and catered for students such as yourself:

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 with us as a member of the community - even after your assignment is finished. Your time, energy, and your contributions will be highly valued and appreciated among us.