Oceania Dairy sold milk supply contracts to Synlait Milk, which is half-owned by China's Bright Dairy, last year after failing to raise about $75 million to build a milk powder plant near Glenavy that would have processed 220 million litres of milk a year, producing 32,000 tonnes of powder.
Yili said it has a preliminary cooperation agreement with some local farmers to supply the plant, and indicated plans to draw on Fonterra Cooperative Group's regulated supply of raw milk.
Oceania Dairy director Don Brash told the NewZealandInc.com website that Yili had to announce the deal once its board had decided to go ahead.
Yili had been named as a potential suitor to New Zealand Dairies' South Canterbury milk processing plant in 2010, when Russian owner Nutritek Group started shopping around for a buyer.
Fonterra ultimately bought the plant this year out of receivership, and a phantom buyer claiming to have offered a better deal said it missed out because it needed OIO approval.