China has been pumping a lot of cash into its system to lift market sentiment, as the world's second-largest economy walks a thin line between curbing debt and keeping everything running smoothly. Last week, the People's Bank of China injected cash totaling 810 billion Chinese yuan ($122.4 billion) in five straight days of daily liquidity management operations. Those actions, which represented the largest weekly net increase since January, were in part a Beijing response to its 10-year sovereign bond yields spiking to multiyear highs, experts said. "Surging Chinese government bond yields hit the nerve of ... (full story)