(Bloomberg) -- Chinese Premier Li Qiang downplayed concerns about challenges facing the economy and reassured investors that Beijing will step up supportive measures for growth, as the International Monetary Fund called on the government to carry out pro-market reforms. Most Read from BloombergUS Homebuyers Expecting $10,000 Savings Face Tough RealityHarassment and Drugs Plagued a Citigroup Division for YearsFed’s Powell Ready to Support Job Market, Even If It Means Lingering InflationGucci’s Ch