China’s growing demand for high-bandwidth memory (HBM) is reshaping its chip sector. Yangtze Memory Technologies Co. (YMTC), long centered on NAND flash, is planning to expand into DRAM to produce HBM for artificial intelligence chips, according to three sources cited by Reuters. The plan underscores Beijing’s urgency to boost domestic chipmaking after the US expanded export controls in December 2024, restricting China’s access to HBM.