Will Carington, works for Noodle
To learn more about TOEFL preparation courses in China, my advice would be to contact TOEFL's China office, which you can reach either via email or at 86-10-82345672. Certain TOEFL preparation materials are also available online, and you can order practice books from TOEFL's main website. For a list of 2015 testing dates and sites in China, visit TOEFL's China website.
Hope this helps, and good luck!