Sigh！北京地铁将告别两元时代~~（>_<)~~

The capital city of Beijing may raise bus and metro fares in the second half of this year. Zhao Lei, the vice director of the Beijing Development and Reform Commission, says authorities may learn from the experiences of other nations or cities regarding their approach to public transport management and introduce different kinds of tickets, for instance, weekly and bi-monthly tickets for commuters. However, Zhao did not reveal any details on the extent to which the prices may be adjusted. Why is it happening?