Jiang is also being investigated for alleged tax evasion.
Jiang challenged the restraining order, claiming that there was "no reasonably arguable cause of action, or case appropriate to the nature of the pleading", and that it was an abuse of court process.
Police argued that the cash had come from Jiang's unlawful operation of a brothel and that she had "unlawfully benefited directly or indirectly" by nearly $800,000 and that the money taints the property sought to be restrained, either directly or indirectly.
The police said the assets and cash could not be accounted for from identified legitimate sources of income.
After a hearing at the High Court in Christchurch, Justice Cameron Mander dismissed Jiang's application to strike out the police application for restraining orders.
"I am satisfied that a foundation has been established upon which there are reasonable grounds to believe that Ms Jiang has engaged in significant criminal activity," Justice Mander concluded.
"I am not satisfied that the Commissioner's application for restraining orders is clearly untenable."
The matter will now go to a full hearing.