Registration is made through the IAU webpages. Click on

Early online registration is from September 1, 2011 -- February 29, 2012.
registration fee: 4220 CNY = US $660 = 496 euros

Regular online registration is from March 1, 2012 -- August 10, 2012.
registration fee: 4556 CNY = US $715 = 536 euros

On-site registration is from August 19, 2012 -- August 26, 2012
registration fee: 5056 CNY = US $793 = 594 euros

Lower rates are available for students and seniors.