Beijing isn't itself a cruise port, but is served by the port of Tianjin. Together, the port of Tianjin is the point of embarkation for only twenty cruises every year from Royal Caribbean to Asia.
On average cruises from Beijing are moderately affordable compared to other ports. The illustration below shows the monthly average cost per day for cruises from Beijing (Cruises only depart from Beijing between May and October). Cruises scheduled from Beijing during the the peak season of summer are considerably more expensive than the low months of spring and fall.