Please advise what bus no. do I have to take from HK airport to Newton Harborview, Shaukeiwan.

No direct bus can take you to the hotel. You are advised to take express train from HKIA to Kowloon Station. Then transfer to Tung Chung Line to Hong Kong Station and Island Line to Shau Kei Wan Station, Exit D1. The whole way takes around 75 mins. And the ticket fare is 90 HKD per person. After that, walk northeast around 120 yards to find the destination.