There was dead silence in the hall.
Tang Yue heard it clearly this time. Something was really knocking the door from the outside. Furthermore, it was knocking on the inner hatch of the airlock… He originally imagined that it could have been a rock hitting Kunlun Station as a result of a strong gust of wind. It was said that such things often happened on the high plateau radar stations on Earth. A sudden sweep of the wind could send rocks slamming into the walls or doors, creating knocking sounds.
However, Tang Yue quickly eliminated this possibility. Mars's atmosphere was thin, making it impossible to lift rocks no matter how fast the wind speed was.
He paused for a few seconds. His brain raced, but he couldn't find a command to issue to his limbs. Tang Yue had been trained, but never once in his training was he taught what to do if someone knocked on the door outside Kunlun Station.
