Along with the appearance of container houses, the indoor configuration of mobile homes has been greatly improved. The advent of air conditioning has ensured comfort in indoor conditions, and fire insulation materials have ensured safety. Although the price of the container is much higher, the container house can be rented, so the cost of short-term use is much cheaper than the average mobile house. These factors have replaced the type of mobile homes, and the materials used have also been greatly improved. In this way, the safety and performance of mobile homes built have been greatly improved.