As for the 'front hall' style added to the entrance of the cave, Dong Tianyu had already thought of it. Even though reinforced concrete is abundant in the Shadow Space, Dong Tianyu does not possess the 'architecture' skill.
If he wanted to consume survival points to construct quickly, it could only be done within the cave mansion itself.
After much thinking, Dong Tianyu came up with a very convenient construction method which was to place two containers horizontally at the cave entrance as a makeshift door.
When going in and out, he could simply utilize the Shadow Space to remove the containers and reposition them back once he departed.
However, this 'lazy' method was quickly dismissed after a thought.
After all, Dong Tianyu spent most of his time in the cave mansion, so he couldn't block the eexit with the containers, as it would greatly inconvenience the access.
