DRAM and NAND are two markets China is trying to get into:
This being China, there are multiple background layers to the story. Firstly, China wants to be independent and self-sufficient in memory and NAND chip supply and has a multi-year, state-backed and subsidised initiative to make that happen.Meanwhile, Micron is suing UMC for stealing some of its IP for Fujian Jinhua, and the US government filed charges against UMC and Fujian Jinhua on that matter.
Business like the Tsinghua Unigroup, Fujian Jinhua and Yangtze Memory Technology are involved in this. Tsinghua tried to buy Micron three years ago but was rebuffed. Yangtze Memory Technology is in the 3D NAND business. Fujian Jinhua is a DRAM foundry startup.
Via: The Register