There isn't much room for modification structurally, as the tent itself is meant to contact the air. Additionally, this is a tent made of soft materials, making it impossible to create a vacuum layer or fill it with rigid high-performance insulation materials between the outer and inner fabrics to make an insulation layer.
The traditional double-layer design is already a reasonable structure, even for expeditions on Mount Everest and in the North and South Poles, this double-layer tent is adequate.
All Chen Xin could do was add an inflatable insulation layer to the tent's base to prevent heat from dissipating to the ground, and add a small porch with a two-layer curtain at the entrance, preventing cold air from entering the tent directly when someone opens the curtain, thus reducing heat loss indoors.
