I don’t really want to translate this one, I’ve done far too much public transport lately, but this article in TBN says planning work on four new subway lines has started and two more will begin construction this year. Those to enter the planning stages are lines 3, 11, 12 and 16, while lines 7 and 14 are those to begin construction by the end of the year. Line 15 and the Fangshan line might also begin construction. What strikes me as being the key point, though, is that subway expansion is to be sped up.
But to be honest, I’m feeling too lazy to read the whole article in detail, let alone translate it. Sorry.