Shares were mostly lower in Asia on Tuesday as investors stepped back after several days of advances, erasing early gains. Markets are awaiting the Federal Reserve meeting on Wednesday and the outcome of a major Chinese planning conference. KEEPING SCORE: Japan's Nikkei 225 index lost 0.3 percent to 22,866.17 while South Korea's Kospi dropped 0.5 percent to 2,458.56. The Hang Seng index in Hong Kong shed 0.2 percent to 28,894.58. The Shanghai Composite index shed 0.7 percent to 3,300.24.