According to a recent statement on the Shenzhen Stock Exchange, where Beingmate shares trade under a restricted ticker, the joint venture has a current book value of A$119m. That included land, buildings and working capital.
Continuous Disclosure understands that some amendments were made to the original joint venture agreement in April 2017.
This included a product purchase agreement that stipulated the purchase volume of the base milk powder from the plant that Beingmate sold was not less than 750,000 tonnes per year, or 51 per cent of the total annual production capacity of Darnum.
But sales volumes did not meet those expectations, meaning Beingmate had to pay a fixed compensation fee of about A$200m.
Beingmate then decided to withdraw from the agreement and Fonterra was happy to oblige.
Fonterra said taking full control of Darnum will give it more options.
"We will be able to look for new partners, improve efficiencies and produce the optimum product mix that creates the greatest value for our farmer-owners and unit holders," the spokeswoman said.
Meanwhile, Beingmate's share price is still languishing under 5 yuan despite the company's return to profit in the last two quarters.
Fonterra paid 18 yuan a share for its stake and has since written down the value of its investment by $433m.