You can Buy and Sell USDT in the chain of erc20(ethereum) or trc20(tron) into HKD Cash easily through Milways Crytpo. Please be noted Milways Crytpo does not provide any bank related service, such as FPS/SWIFT/Alipay.
Other than HKD, we support exchange with foreign currencies. i.e. USD/EUR/SGD/MYR/JPY/KRW/AED/PHP.