The 0 fee of Backpack is not yet comparable to Coinbase/Hashkey. The main body is an ordinary company, which has a large amount of cross-border public and private transactions. It is very difficult to explain once it needs to be explained, as anyone who has worked hard in the FTX era knows. Coinbase directly enters the same custodian bank SCB SG with almost zero risk control, while Hashkey incurs additional fees but the bank recognizes monthly statements from local financial institutions.