The Heidelberg Aerospace Association AS37 (Atmospheric Shuttle, type 37) is a single-stage-to-orbit spaceplane with a compact thermal fusion propulsion system. A high-performance, medium-capacity vehicle, its performance envelope includes most terrestrial planets with atmospheres, even if the atmosphere does not contain sufficient oxygen to support combustion.
The payload the AS37 can deliver to orbit varies significantly depending on where planetary parameters (atmosphere thickness and composition, gravity, etc) place the craft within its performance envelope. From an earthlike world in its stock configuration, it can transport 15 tonnes of cargo and passengers to a stable orbit. Seats for 4 passengers and 2 crew are provided in the cockpit. (Passenger body and baggage mass count against the 15 tonne figure quoted previously.)
A variety of modules can be placed in the cargo bay. The Zheng He has a HAA AS37-PM24 passenger module available, which masses 10 tonnes. It provides space and life support for 24 passengers and their baggage. (8 seats can be removed to accommodate the portable Biran habitat.) The cargo bay itself can be pressurized for the transportation of non-living cargo incompatible with vacuum.