Visa to China
Please check the visa information from the official website of Embassy of P. R. China in your own country. If you are attending AIED 2017, you may apply for an F visa, whereas your non-academic travel companion(s) may apply for an L visa.
(For some countries, visa service is outsourced to Chinese Visa Application Center. Please check to see if this applies to your country.) For other countries, http://www.china-embassy.org will give you more details.
If you are attending AIED 2017 and need an invitation letter to support your visa application, please follow the directions through request for invitation letter (powered by Google Forms).
About Wuhan: Official Introduction Site
About Central China Normal University: Official Site
Venue and Accommodations: Information and reservation details
(Also, Travel China Guide offers a series of comprehensive China travel guides.)