China's paramount leader, Xi Jinping, is widely regarded as China’s strongest leader since Mao Tse-tung. So what will Xi Jinping do with his unprecedented personal power? And will China overtake America as the region’s superpower? Also in this edition of Between the Lines, what’s the future for Yemen – a country in the grip of a complex civil war?  Since Houthi rebels forced the president out of the capital earlier this year, the besieged government has been fighting back with the help of deadly Saudi-led airstrikes.