SHANGHAI, Dec 14 - Stocks of Chinese chipmakers jumped in early trading on Wednesday after a Reuters report a day before that Beijing is working on a $143 billion package to aid the country's semiconductor sector.

China's SSE STAR Chip Index opened nearly 4% higher. Shanghai-listed shares of industry giant Semiconductor Manufacturing International Corp (SMIC) rose as much as 5.2% to a four-month high.

China is working on a more than 1 trillion yuan ($143 billion) support package for its semiconductor industry, three sources said on Tuesday, in a major step towards self sufficiency in chips and to counter U.S. moves aimed at slowing its technological advances. (Reporting by Shanghai newsroom; Editing by Muralikumar Anantharaman)