Chang, 63, was arrested at OR Tambo International Airport in Johannesburg on December 29 for his alleged involvement in $2bn (roughly R28.79bn) in fraudulent loans to Mozambican state firms.
AFP reported in February that the Mozambican government took out loans amounting to $2bn to buy a tuna fishing fleet and surveillance ships, but hid the transaction from parliament and international donors.
The hidden debt plunged Mozambique into its worst financial crisis since independence from Portugal in 1975, as donors froze contributions.
An independent audit found that a quarter of the loan amount was diverted and not accounted for. The US alleges that at least $200m (R2.88bn) was spent on bribes and kickbacks, including $12m (R172.2m) on Chang, who allegedly signed off on debt guarantees.