Participants are seen at a conference to announce the selected experiments on board the China Space Station(CSS) held in Vienna, Austria, June 12, 2019. Nine scientific experiments from across the world have been accepted to be conducted on board the upcoming China Space Station (CSS), the United Nations and China announced here on Wednesday. The six fully and three conditionally accepted experiments involve 23 entities from 17 countries, emerging from 42 proposals tabled by 27 countries. The CSS is expected to be operational around 2022. (Xinhua/Guo Chen)