According to a license application submitted to NRC on June 28, 2016 (XSNM3774), the United States will supply to China 0.141 kg of HEU containing 0.130 kg of U-235. The application specifies that the material will be used in "thirty six (36) fission chambers containing 3.9 grams each of enriched uranium used in neutron flux monitoring systems at two reactors." The application was submitted by Thermo Fisher Scientific company, based in San Diego, CA, the recipient of the equipment is listed as Huaneng Shandong Shidao Bay Nuclear Power Company in Rongcheng, Shandong Province.
Previous HEU export license for supplying the material to China, XSNM3702, was issued in July 2012. It covered export of a similar amount of HEU - 0.1342 kg of U-235 in 0.144 kg of HEU.
UPDATE: The license XSNM3774 was granted on June 19, 2017.