they are not "astronauts", but taïkonauts. The chinese term for going into space. Astronauts are for US. Cosmonauts for Russians. and Spationauts for Europeans.
https://en.oxforddictionaries.com/definition/astronaut
https://en.oxforddictionaries.com/definition/cosmonaut
https://en.oxforddictionaries.com/definition/taikonaut
http://www.merriam-webster.com/dictionary/astronaut
http://www.merriam-webster.com/dictionary/cosmonaut
[ Merriam-Webster doesn't define Taïkonaut ]