"The United Nations Office for Outer Space Affairs (UNOOSA) and the China Manned Space Agency (CMSA) have agreed to work together to develop the space capabilities of United Nations Member States via opportunities on-board China’s future space station...Under the agreements, UNOOSA and CMSA will work together to enable United Nations Member States, particularly developing countries, to conduct space experiments on-board China’s space station, as well as to provide flight opportunities for astronauts and payload engineers."
--Press statement by UNOOSA posted June 16, 2016. This will become more relevant as the United States and its partners start to wind down the International Space Station and end the program by 2024.