Subway riders in Beijing are likely to embrace a more equitable fare system early next year allowing them to pay for the ride depending on the travel distance instead of the current flat fare.
The city's subway operator on Sunday announced its plan to begin installing automatic ticket-selling machines in stations on lines 1 and 2 in July.
The project is scheduled to be completed at the end of the year.
Meanwhile, line 5, which will go into use in September, will have ticket-selling equipment available.
A new citywide fare system is expected next March.
More upcoming metro lines, including line 10 and the rail link between the city and its airport, will also start running with the facilities next June in time for the Olympics.
Previous reports said security cameras would be installed inside trains running on lines 1 and 2 this month in a bid to improve management.