Asian shares began the week on a plaintive note amid losses on Wall Street and worries over China, while investors braced for a Federal Reserve meeting that might take another small step toward lifting U.S. interest rates. Japan’s Nikkei slipped 0.5 percent, while MSCI’s broadest index of Asia-Pacific shares outside Japan lost 0.8 percent. In China, the CSI300 index .CSI300 of the largest listed companies in Shanghai and Shenzhen fell 1 percent, with sentiment still soured by a poor PMI survey on manufacturing.