Beingmate said Great Wall would provide a full suite of services to help improve the company's core competitiveness including asset restructuring, equity investment and debt restructuring.
It also said its controlling shareholder, Beingmate Group, intends to transfer some of its listed company shares to Great Wall, which could see it end up with more than 5 per cent of Beingmate.
However, no formal agreement has been signed between the parties.
Whether that fits in with any exit strategy that Fonterra may be looking at is unclear, although dairy analysts in China have speculated that the Kiwi Co-operative could find a way to sell its stake to Chinese government investors.
Beingmate is 34 per cent owned by Beingmate Group and 18.8 per cent owned by Fonterra.
In 2015 Fonterra invested $755 million for an 18.8 per cent stake in Beingmate, which it said would give access to the lucrative Chinese market for its infant formula and other products.
Beingmate originally had sole rights to distribute Fonterra's popular Anmum brand in China but that is no longer the case, Fonterra chairman John Monaghan recently conceded.
Fonterra Australia has used the Darnum plant to manufacture nutritional base powders for Beingmate and ship the product to China. According to its announcement, Beingmate plans to sell its 51 per cent stake in Darnum back to Fonterra or another entity.
Fonterra has since written down the carrying value of its Beingmate investment to $204m after a string of heavy losses decimated Beingmate's market value.