Regarding Direct transfer to Shenzhen

I am landing from India to Hong Kong Airport on January 26, 2018. From Hong Kong Airport I wish to go directly to SZ through Ferry without entering Hong Kong. Do I need to have a Pre-Arrival Approval for Hong Kong for that ? Similarly while combing back, I have to come to Hong Kong Airport from SZ and take a flight back to India without entering Hong Kong. DO I need a Pre-Arrival Approval for that ? Kindly reply fast so that I can plan my travel at the earliest. Thanks.