As the United States grapples with mounting debt, China is doubling down on efforts to clean up its own balance sheet, vowing to tackle risks with “iron discipline”.The pledge came as the world’s second-largest economy weathers a years-long real estate slump and cooling domestic demand. Beijing faces growing pressure to balance short-term growth targets with longer-term deleveraging, as it seeks to transition to a more sustainable economy.In the government work report delivered on Thursday to...