Both rely on China for raw materials. Rare earth includes 17 metals mined from rock quarries. Rocks are pulverized and processed, usually in the form of white powder, into rare-earth elements. Eighty percent of the world's known reserves of rare earth are in China - in various provinces in the northern and central regions. Yttrium is widely used in television sets.
Dysprosium is found in the metal coating of halogen lamps.
Neodymium goes into mobile phone batteries and superconducting devices. It is valuable. Jiang is an unlikely commercial hero in China. For most of the first three decades of his life, he was an unwilling symbol of capitalist oppression. I wasn't a Red Guard.