Gao admitted seven charges relating to the theft of $6.782 million. During a hearing in the Court of Appeal last week, even the inquiries from three justices could not shed light on what happened to $3.7 million of the stolen funds that was still missing.
Gao became rich after applying for a $100,000 loan to keep the doors open at his struggling petrol station in Rotorua.
Instead, Westpac transferred $10 million after a clerk put the decimal point in the wrong place.
Gao transferred the money overseas to 23 bank accounts before fleeing from New Zealand. Despite the best efforts by Westpac and authorities to recover the money, $3.7 million is still missing.
Defence lawyer Ron Mansfield told the appeal hearing the bank had liquidated the property owned by Gao, who was declared bankrupt earlier this year.
The Appeal Court justices said it was for Gao to establish what had happened to the outstanding $3.7 million.