Li Tian, station manager of Beijing Chaoyang Railway Station, highlighted efforts to ensure seamless transfers between rail and subway services.

"We coordinated with local government and transit authorities to prepare fully, making passenger travel more convenient," he said.

A frequent business traveler surnamed Li welcomed the development.

"Whenever I return to Beijing by high-speed train, I prefer taking the subway home. Chaoyang railway station used to lack subway connectivity, and I often had to wait a long time for a taxi at night. The new subway lines will make things much easier," he said.

Beijing's urban rail transit system operates like an underground megacity, with over 11 million passengers using the subway on weekdays. That's equivalent to half the city's population commuting below ground.