I also tested zero transaction fee withdrawal through @ Backpack_CN, submitted it on the Backpack website yesterday, and today ZA Bank has received 200 USD. The overall process is simple: Recharge USDC into the Backpack on the chain, currently supporting both Solana and Ethereum chains; 2/Withdraw from Backpack and add Hong Kong bank card information; To operate on PC, the iOS app has not been updated yet. 3/ Backpack