If helen group put you on z visa and you got the foregin expert certificate , that means it is legally for you to teach in China, then helen Group started holding your documents , and also they started threatning you saying that they will cancel your resident permit and they will blacklist you with no reason, which is not true

as all of this is not right ,

just contact with the government on

Units Address of the Handling Counter Contact Person Telephone
Zhejiang Administration of Foreign Experts Affairs Room 202, Building 3, 32 Baochu Road, Hangzhou Zhang Chenyi
Xi tangping 0571－87051076
0571－87052536
Hangzhou Administration of Foreign Experts Affairs Room 1316, Jinhui Mansion, 73 Moganshan Road, Hangzhou Zhang Xihong
Zhang Xinzhen 0571－88392816
0571－85252608
Ningbo Administration of Foreign Experts Affairs Room 309, Building 1, 91 North Jiefang Road, Ningbo Chen Chuanben 0574－87186224
Wenzhou Administration of Foreign Experts Affairs Room 645, 6th Floor, Main Building of Wenzhou Executive Administration Center, Wenzhou Cai Shiwei 0577-88967822
Huzhou Administration of Foreign Experts Affairs Room 508, Building 2, Huzhou Administration Building, Huzhou Fu Yudan 0572－2398730
Shaoxing Administration of Foreign Experts Affairs Room 507, Government Building, Shaoxing Yu Ping 0575－85141274
Jinhua Administration of Foreign Experts Affairs Room 804, Government Building, Jinhua Wang Chaoyang 0579－82469660
Taizhou Administration of Foreign Experts Affairs Room 1249, Government Building, Taizhou Zhu Changzheng 0576－88511930
Quzhou Administration of Foreign Experts Affairs Room 403, Bureau of Labor and Social Security, Hehuasan Road, Quzhou Wang Hongling 0570－3085033

Helen Group company is blacklisted in Taizhou, as it is one the famous illegal companies in China,

Just take care and make sure never to sign a contract with them,

Thanks,