Your guess is as good as mine, but I understand that they found a way to reactivate their TOPUP cards. These are an alternative way for clients to deposit CNY in their Huobi accounts, distinct from sending bank wire deposits to the Huobi corporate account.  I don't know exactly how those cards work, but it seems that they asre issued by Huobi and can be "recharged" through a 3rd party payment processor.  Huobi used to have that option, but they suspended it voluntarily on Apr/01 or tehreabouts.