By Laurie Chen JIUQUAN, China, May 24 (Reuters) - China sent three astronauts to its space station on Sunday, one of whom will stay for a year, a record length for the country, enabling the study of long-duration human physiology in space as Beijing works towards its ambition of a crewed moon landing by 2030.

Vladimir Putin appeared to struggle with mobility issues during his arrival in Beijing for a high-stakes summit.