A new travel card will enable passengers to use all subway systems throughout Beijing, Tianjin and Hebei province by the end of this year, as part of efforts to promote the integrated development of the Beijing-Tianjin-Hebei region.

Currently, one type of travel card sold in Tianjin and Hebei can be used on buses in Beijing, but not on the capital's subway system.

"In the past three years, the region has made progress in many areas, including road construction, transportation, energy saving and reducing emissions," said Rong Jun, a spokesman for the Beijing Municipal Commission of Transport.