https://www.cnet.com/news/china-reportedly-investigating-chip-makers-samsung-micro-technology-and-sk-hynix/

Chinese regulators have launched a probe into memory chipmakers Micron Technology, Samsung Electronics and SK Hynix, The Wall Street Journal reports. The China offices of all three companies were reportedly visited recently by China's State Administration for Market Regulation. 

The companies are dominant suppliers of DRAM, or dynamic random-access memory, chips used in smartphones and computers to store data. Office visits by Chinese investigators come as prices of the chips have soared, according to Reuters.