Chinese dairy investor Bright Dairy paid $82 million a year ago to take a 51 percent controlling interest in Synlait, which tried and failed to find New Zealand investors through an initial public offering on the NZX.
Penno said Synlait was rebranding "as a global nutrition business, and differentiating it from its New Zealand and international competitors."
Chinese demand for high integrity dairy products is strong because consumers lost faith in locally produced milk when widespread poisoning with a bulking agent, melamine, was traced as the cause of an outbreak of illness and deaths among Chinese infants just before the 2008 Beijing Olympics.
The opening coincided with news that a woollen mill that has operated at Milton, south of Dunedin, since 1897 is to close. The Bruce Woollen employs 28 people, who were handed redundancy notices last Friday, the Otago Daily Times reported.
The mill, where Swanndri products were first made, had closed once before, in 1999.
Groser painted a grim picture of multilateral trade negotiations momentum and the European and American economies, but identified "unmistakable momentum to move forward within the Asia Pacific on a regional front" on new trade agreements.
Growth in the emerging economies of Asia, even if it stalled, was strong by any standard, he argued.
"The political take-away is obvious: if you want your economy to move forward and you want higher exports and more secure jobs, you want to be part of this growth picture, or you need to re-examine some fundamental policies," Groser said.