The extravehicular activities (EVAs) carried out by two Chinese astronauts from Sunday evening till early Monday morning will help expand the capabilities of the mechanical arm on the country's space station, said the China Academy of Space Technology (CAST). Astronauts Zhai Zhigang and Wang Yaping were out of China's space station core module Tianhe by 8:28 p.m. (Beijing Time) Sunday, and completed their EVAs and returned to the space station core module Tianhe at 1:16 a.m. (Beijing Time) Monday. They performed a series of extravehicular tasks, including installing the dual-arm connector (the device linking the big and small mechanical arms)…