Chinese shares fell sharply again on Wednesday after plunging in the previous session, taking no comfort from a rise in global markets, with sentiment fragile ahead of a policy statement later from the U.S. Federal Reserve. China’s stock markets have slumped 23-24 percent so far this year, knocking nearly 12 trillion yuan ($1.8 trillion) off the value of the indexes as of Tuesday night. Oil had hit a 12-year low last week due to oversupply and concerns about faltering global growth, particularly in China.