Dragonized, the Shanghai's Headless Office of the ACT Education Solution Limited, that manages the academics of the centers around the country has actually "blacklisted" the, to them, bad centers. Here below are all the centers and of of this link you may see which ones are blue and black (listed);

http://www.actinternationalservices.com/en/aesl/gac/atc.html

China
Beijing Beifang Foreign Language School GAC center
Beijing Hai Dian Foreign Language Shi Yan School GAC center
Beijing Zhong Guan Cun Foreign Language School GAC Center
Australia International Foundation Center, Shude Middle School Chengdu
China-Australia College Beijing (HuiJia)
China Oil & Gas Pipeline Bureau Middle School GAC Center
Chongqing Owen Foreign Language School
ESLI Zhengzhou Campus
Fortune Business Management Consulting Institution
GAC Center of Quanzhou School of Beijing Normal University
GAC Hunan Approved Teaching Center
GAC International UniversitiesPreparatory School of Shanghai, Pudong Center
Guangdong Training School for Studying Abroad
Guangxi University of Nationalities
Harbin Police College, Xing Liang School
Hefei Run'an Boarding School GAC Approved Teaching Center
Henan International Foundation Academy
Humen Foreign Language School
Jiangsu College for International Education
Jiangyin Yaosai Middle School GAC Center
Jincheng College, Nanjing University of Aeronautics & Astronautics GAC Center (JC-NUAA GAC Center)
Kunming Foreign Language School GAC Center
Kunming University of Science and Technology GAC Center
Liberal College at Zhuhai
Lulu International Exchange School at the University of Technology
Mudu Senior High School
Ningbo Bei Lun High School GAC Center
Qingdao University GAC Center
Shandong University GAC Center
Shanghai University GAC Center
Shenzhen BNU Affiliated High School Training Center
South China University of Technology
Tangshan Foreign Language School GAC Center
Tangshan No 1 High School GAC Center
Tsinghua University, School of Continuing Education
Wujin Senior High School GAC center
Wuxi Guanghua Private School
Xiangtan Sunny Foreign Language School GAC Center
Xi'an Jiao Tong University GAC Center
Xiamen Yingcai School International Education Center
Wuhan Zhongnan University of Economics and Law, Continuing Education College
Zhejiang University School of Continuing Education
Zibo Experimental High School GAC Center

However, the Headless Office's opinion is unfortunately bias which is due to the war in between the ACT (the US owner) and GAC (the Australian subsidiary and author of the books). Moreover, I dare to say that some subscribers on mainland China choose to cooperate with the American and some with the Australian company which only makes the list more spicy with a rather large variety of choices :Lol

Cheers and beers to all bogus GAC-ACT mainland schools to crash one day and cheers and beers to the American ACT fall and replacement for SAT :lol :lol :lol