Is it true there is a green bus to take me from Causeway Bay, Hong Kong?

I haven't heard about such a green bus. I know bus 973 goes to all these places: Aberdeen, Repulse Bay and Stanley. But it doesn't go to your location.

You can walk to Hysan Place, Hennessy Road to take bus 72 to Aberdeen Wholesale Fish Market station directly. Duration is about 35 minutes and ticket fare is about HKD5. The station is to the west of SOGO department store, on the opposite road side with SOGO.

From Aberdeen Wholesale Fish Market, you can walk to St. Peter's Church on Aberdeen Main Road to take bus 973 to 127 Repulse Bay Road, then walk to Repulse Bay. After, go back to the alight site to take another bus 973 to Stanley (alight station is Stanley Plaza).