Yes, you can generally leave the airport during a layover in Beijing in 2026, provided you qualify for China's 24-hour, 72-hour, or 144-hour visa-free transit policies. For a standard layover under 24 hours, you must apply for a "Temporary Entry Permit" at the specialized desk near the immigration counters at Beijing Capital (PEK) or Daxing (PKX). In 2026, China has extended its unilateral visa-free policy through December 31 for citizens of over 40 countries, including France, Germany, Italy, and Australia, allowing them to enter for up to 15 days without any prior paperwork. If you are from a country like the US or UK that is eligible for the 144-hour transit, you must show an onward ticket to a third country (e.g., London to Beijing to Tokyo). It is a peer-to-peer essential to allow at least 2 hours for the immigration process and 1 hour for the airport express train to reach the city center. This makes a layover of 8+ hours a high-value opportunity to see the Great Wall or Forbidden City before your next flight.