An alleged offer by a company backed by the Chinese government to acquire US chip producer Micron Technology faces a considerable uphill battle before it can go ahead. Tsinghua Unigroup is reportedly proposing to acquire Micron, producer of NAND and DRAM and a RAM supplier to Apple, with the supposedly low reported price of $23 billion and concerns by regulators and US lawmakers likely to torpedo the potential sale to the Chinese company for the foreseeable future.