12306 has recently introduced a new service called Air-Rail Intermodal Passenger Transport. Travelers can now purchase multi-route airline tickets from six different airlines through the 12306 App. This convenient service covers 157 transfer stations in 80 domestic hub cities, offering access to 2,482 routes for passengers. 

The Air-Rail Intermodal Passenger Transport Service on the 12306 App offers a one-stop ticketing solution, allowing travelers to buy both flight and high-speed train tickets in a single transaction, ensuring seamless connections between flights and trains.
(Source: Beijing Release)
Source: BeijingService