China's economic slowdown is polarising government advisers over the best way forward, with advocates of structural reforms now emerging from the shadows in a challenge to others calling for more state spending to shore up faltering growth. The rare debate among advisers, who influence policy-making but do not wield direct power, comes as global markets scramble for clues on how authorities will halt a downturn that has left millions without jobs, forced investors to flee and the yuan to tank. A dribble of piecemeal support measures from Beijing in recent months has raised questions abo...