Anxious China emerges as diplomatic player in Afghanistan --- (Reuters) - China is quietly preparing for a more robust role in the future of Afghanistan, concerned that the withdrawal of NATO troops will leave a hotbed of militancy on its doorstep. -- The two countries are connected by a narrow mountainous corridor that is almost impassable, which meant Beijing could focus on mining and mineral deals in Afghanistan as Western forces battled Taliban insurgents. But officials say that China is emerging as a key strategic player. -- In August it will host a "Heart of Asia" conference on Afghanistan, which may have a newly elected president by then, inviting leaders from regional nations including India and Pakistan. A Western diplomat said China has already held discreet trilateral talks with Afghanistan and other countries. -- One of its chief worries is that Uighur militants who want a separate state in western China's Xinjiang region will exploit the security vacuum left after the bulk of NATO forces withdraw by the end of the year to step up their fight. -- Hundreds of Uighur fighters are believed to be holed up in rugged, lawless tribal areas straddling Afghanistan and Pakistan. -- In a rare interview from an undisclosed location last month, their leader told Reuters that China would be made to pay for its crackdown on separatists in Xinjiang. -- "In the past we said: 'The Americans are there, and the Americans don't want anyone else, especially not another great power, taking their place'," said Hu Shisheng, a South Asia expert at a government-backed think tank, the China Institute of International Relations in Beijing. -- "Now with the U.S. strategic focus shifting, neighboring countries cannot just let Afghanistan descend into chaos. -- "The Pakistan and the Afghanistan Taliban are sympathetic towards the Uighurs. So we absolutely have to pay attention to this, in a way that perhaps we did not before," he said. --- FOCUSED ON ECONOMICS -- So far, China's commitment to Afghan reconstruction since the ouster of a hardline Islamist Taliban regime in 2001 has been around $250 million and its security support has been mostly limited to counter-narcotics training. -- China has a $700 million agreement to drill for oil in the Amu Darya Basin and a $3 billion deal to develop the Aynak copper mining project. But insiders say security concerns, not investment, are the primary driver of China's new focus. --- Officials believe, however, that, with the West's attention on the region set to fade, Beijing has an opportunity to flex its diplomatic muscle, using warm relations with Afghanistan and Pakistan to ease suspicion between the two neighbors. -- Kabul has long accused Islamabad of providing havens for militants and sponsoring attacks inside Afghanistan, and now Pakistan believes Afghanistan is doing the same. A decade of U.S. diplomacy has failed to reconcile the two sides. - More, Katharine Houreld and Ben Blanchard, at: http://www.reuters.com/article/2014/04/14/us-china-afghanistan-diplomacy-idUSBREA3D0H120140414