Chinese CHI 2015 is associated with CHI 2015 as one of the Asian CHI Symposia (ACHIS, http://chi2015.acm.org/program/asianchisymposia/). You may register Chinese CHI through the CHI 2015 Attendee Registration website: https://www.regonline.com/Register/Checkin.aspx?EventID=1601543.
To register Chinese CHI, you must also register for at least one day of the CHI conference. Fees for Chinese CHI are Attendee $250 and Author $235. One-day registration for CHI is $300 for ACM or SIGCHI members or $375 for non-members if registered by *March 6, 2015* (early registration deadline).
Please also make sure that you choose the right Asian symposium in the registration site. We're Symposia 01, and the fee is higher than other Asian symposia.