Source: the official website of Tianjin Exit-Entry Department
1.aliens who do not lodge at hotels, guesthouses or inns shall, within 24 hours(72 hours in rural areas) of entry, go through accommodation registration at local police station.
2.aliens holding visas z,q1,x1,s1 or j1 shall, within 30 days of entry, apply for residence permits to the exit-entry department of the public security bureau of the city where the applicants reside.
3.aliens shall not be employed in china without permission of the competent authorities of the chinese government.
4.aliens who reside or stay in china shall carry with themselves their passports or residence permits for possible examination.
5.in case of emergency, please dial 110 to seek help from police.
Again, the Tianjin Exit-Entry Department emphasize the Accommodation Registration.
Just a reminder for getting Beichaka (Accommodation Registration Form) for your future use.