Oamaru Meats is flat out processing lambs, having regained its approval to export to China.
The company was shut down in mid-September last year after the Chinese Government suspended its permission to send beef.
The situation was caused by beef fat packing that was not up to standard, director Richard Thorp said.
About 140 staff were stood down while Oamaru Meats, owned by China's BX Foods, worked with New Zealand and Chinese authorities to reinstate the export access.
That was achieved in early December, but the company said it took several weeks to rehire staff and it resumed operating on January 6.