Honorary Consulate of Slovenia in Hong Kong

HKDI holder to visit (transit) Slovenia while on a cruiseship
Kindly clarify if a HK Document of Identity ("HKDI") holder with nationality as Chinese upon having obtained a Schengen visa (in this case sought to be issued by the Netherlands being the first intended entry into Schengen areas before heading over to Venice, Italy to board and commence a cruise covering Italy-Slovenia-Croatia-Montenegro-Greece-Italy), would the person still require any other visa other than the said Schengen visa to visit Slovenia, Croatia, Montenegro and Greece along the cruise itinerary as a cruise passenger?

Thanks in advance for specific relevant advice.

your wonderful hospitality!
Dear Mr. Lau, my memory of last year's visit to HJ is highlighted by your wonderful hospitality to me. Although my visit was not official, you made me feel welcome as a Slovenian artist abroad and I thank you for your graceful invitations. I enjoyed your company very much and am happy to know that Slovenia has such representative abroad.
I shall be in Hong Kong again in the second half of April, giving a recital at the City Hall on April 21st.(including Slovenian composer Jurij Mihevc (contemporary of Chopin). I do sincerely hope that you will be able to attend and perhaps support the concert by inviting other persons fond of music and of Slovenia. My concert agent Mrs. Christine Nigam will be in touch with you, sending invitations. With best wishes and cordial greetings, Marina Horak