China Passport holder

ROC passport holders get 30 days visa exemption while PRC passport holders are exempted for 7 days only when transiting to a third country or region (however HK-Macau-Mainland China does not count). Otherwise PRC passport holders need a two-way permit and an entry endorsement to Macau on said permit. If your route is HK-Macau-HK or HK-Macau-Zhuhai, then a PRC passport won't work and you most likely will be refused boarding by the ferry company unless holding a two-way permit.