An integrated transportation system of Beijing Daxing International Airport, an international hub, is scheduled to open in 2019. It will allow passengers to jump onto a bullet train to reach other places in China.

According to a news report from the Beijing Times on Tuesday, a high-speed rail line that links Beijing and Hong Kong will go through underground of the airport. Passengers will be able to reach the railway station at the underground floor of the airport.

Nie Yonghua, an official at the Beijing New Airport Construction Office under the Civil Aviation Administration, confirmed the news, saying the high-speed railway and subway stations will form a rapid transit system that facilitate passenger trips.

He said Beijing municipal authorities are in charge of the railway and subway projects, which will be put into use at the same time as the new airport comes into service.

The report said the ground floor is for international flight arrivals, the second for the domestic flight arrival, and the third and fourth floor are for domestic and international departure respectively. The design is said to be able to ease traffic pressure of the roads that are connected to the terminals.

"The railway will link Beijing and Bazhou, Hebei province, and play a crucial role in coordinated development of the Beijing-Tianjin-Hebei area," said a news report of The Beijing News on Tuesday.

The design of an integrated transportation system will be introduced to airport hubs, said Yang Hao, a professor of rail transportation at Beijing Jiaotong University.

Changchun-Jilin Intercity high-speed rail goes through the Longjia Airport in Changchun, capital of Jilin province and Hainan high-speed rail passes through Meilan International Airport in Haikou, capital of Hainan province, which is an exemplary design of integrated transportation concepts.

The project of Beijing Daxing International airport will involve 79.98 billion yuan ($13.11 billion) of investment and take about five years to complete, according to the National Development and Reform Commission.

The airport is designed to handle 72 million passengers, 2 million tones of cargo, and 620,000 planes in 2025.