How can we have no nationality?

There are roughly the following methods: 1, automatically renouncing nationality, and the local authorities can apply to the civil affairs department to renounce nationality. If there is no other nationality, it is stateless and enjoys the treatment of ordinary foreigners in China; 2. Deprivation, ordinary criminal acts will not deprive nationality. Only when a person's behavior involves an international dispute that the country of nationality can't stand, will he be deprived of his nationality, and then he will generally be deported; 3. Immigrants and other emergencies gave up the nationality of China people in China, but the receiving country did not accept it, resulting in both sides losing their nationality and becoming stateless.