Most of Chengdu is open to foreign travelers without any special regional permits, provided you have a valid Chinese visa or qualify for one of the various visa-free transit or entry policies. While areas like Tibet require a mandatory Tibet Travel Permit and certain border regions in Xinjiang or Western Sichuan may require additional paperwork, Chengdu itself is a standard open city. However, travelers must still comply with national registration requirements, which include registering their residence at a local police station or through their hotel within 24 hours of arrival. Additionally, for those utilizing the 240-hour visa-free transit policy, a temporary entry permit must be obtained from the immigration authorities at either Shuangliu or Tianfu International Airport upon arrival to legally leave the port area and explore the city. Travelers should also be aware that special permits are strictly required if they intend to use Chengdu as a gateway to visit the Tibet Autonomous Region.