According to the state newspaper Thanh Nien, Nguyen Van Hai and Phan Thanh Hai were also believed to have attended a training seminar sponsored by the overseas opposition party Viet Tan.
Menurut surat kabar Vietnam Thanh Nien, Nguyen Van Hai dan Phan Thanh Hai juga diyakini telah menghadiri seminar pelatihan yang disponsori oleh partai oposisi Viet Tan yang berada di luar negeri.