Foreign Minister Murray McCully said he had closely monitored the case. But the ministry this week continued to decline to name the prisoner.
"We are not able to provide any updates for privacy reasons," a spokesman said. "The family have requested that no details be released."
Auckland-based psychologist Dr Peter Schaapveld, who consults for international legal charity Reprieve, said the Kiwi prisoner will be at risk from other inmates and corrupt officials.
"Any foreigner will be a target in a Chinese prison and is likely to be a victim of ongoing financial extortion," he said.
"Conditions in Chinese prisons are notorious for being worse than medieval and she could be held anywhere."
Dr Schaapveld said executions were big business in some parts of China. He added it wasn't uncommon when a death sentence is carried out for teams of surgeons to be standing by to harvest organs from the deceased, which are then sold on.