1, without People's Republic of China (PRC) nationality;
2. Unable to prove identity;
3. Practicing fraud in the application process;
4, was sentenced to punishment is serving a sentence;
5, the people's court informed that there are unresolved civil cases can not leave the country;
6. Belonging to the defendant or criminal suspect in a criminal case;
7. The relevant authorities in the State Council believe that leaving the country will endanger national security or cause great losses to national interests.