Wen Qinxi was extremely anxious for Qie Xieling who had refused to open the door of the panic room for Machu. The kid was as stubborn as an ox, better yet as stubborn as Qie Ranzhe refusing to open the door for anyone other than Su Xin. Wen Qinxi didn't know whether to laugh or cry at this situation.
The kid was obviously intending to use this as a means to protect Su Xin just in case Qie Ranzhe decided to punish his dad for robbing the armoury blind and escaping. He refused to open the door unless he saw Su Xin alive and well. Good thing he didn't have to worry about his daddy laying a hand on Su Xin. Well, apart from the bruise on his nose.
Please check out Venerable Demon King & The Doting Immortal