This HSBC HKD Savings account product has no monthly service fee if the balance is at more than HKD5,000 (rolling average of previous three months, otherwise HKD50 fee will be levied) with rates varied according to amount in account:

Less than HK $5,000            0.0000%
HK $5,000 to HK $9,999            0.0010%
HK $10,000 to HK $149,999    0.0010%
HK $150,000 or above            0.0010%