How long does it take to withdraw funds from securities account to bank account?

According to the transaction cut-off time requirements set by the securities company:
Withdrawals initiated between 09:00-15:55 on trading days can be credited to your account in as fast as 5 minutes,withdrawal of funds is not supported during other time periods.
Single withdrawal amount exceeding HKD 3 million / CNY 3 million / USD 500,000 requires manual approval and is expected to be completed before 15:55 on the Hong Kong stock trading day.
Single withdrawal amount exceeding HKD 8 million / CNY 8 million / USD 2 million requires T+1 working day to complete, please make arrangements in advance.