Russian astronauts Oleg altemiev and Dennis matviev returned to the Russian segment of the international space station after completing the spacewalk mission at 0:37 local time in Moscow on the 19th (5:37 Beijing time on the 19th). Rosneft announced on its official website that during the 6-hour and 37 minute outbound mission, the astronauts completed some preparations for running the "European manipulator (ERA)" in the Russian segment of the international space station, including installing, connecting and testing the external control panel of the manipulator and installing three handrails on the manipulator. It is said that this mission is the fourth and first spacewalk of altemiev and matviev respectively. Russian astronauts are expected to carry out the next spacewalk mission on April 28. On March 18, Russian astronauts altemiev, matviev and Sergei Korsakov entered the international space station. They will work on the international space station for 195 days and plan to return to earth on September 30 this year. (Xinhua News Agency)