With the doors and windows reinforced, the family focused their energy on stockpiling more supplies.

Knowing the importance of water resources in the apocalypse, Su Yao dragged several large water storage tanks out of the warehouse. These tanks were made of a special high-strength plastic, corrosion-resistant and with excellent sealing. She and her father placed the tanks in various corners of the safe house—some in the kitchen, some in the bathroom, and a few in the basement. Next, they connected the water pipes to the safe house's drainage system, so that rainwater could be collected, filtered, and stored. At the same time, Su Yao also brought out a small water purification system. This system could remove impurities, bacteria, and viruses from the water using physical and chemical methods, ensuring the safety of drinking water. She carefully read the instructions and, together with her father, installed and tested the purification system.

In terms of food reserves, they added many new varieties. In addition to the previous rice, flour, cooking oil, and canned goods, Su Yao purchased a large quantity of compressed biscuits. These compressed biscuits are small in size, high in energy, and have an extremely long shelf life. She placed the compressed biscuits in special moisture-proof boxes, each labeled with the quantity and expiration date. At the same time, she also bought some vacuum-packed dried meat products, such as beef jerky and pork jerky, which are rich in protein and can meet the body's needs when fresh meat is unavailable.

To ensure a constant supply of fresh vegetables, Su Yao set up a simple hydroponic vegetable system in a small corner of the safe house. She took out some special nutrient solution and vegetable seeds from her storage space, planted the seeds in the hydroponic tank, and the nutrient solution slowly flowed into the tank through pipes, providing nutrients to the vegetables. Hydroponic vegetables grow quickly and are not limited by soil conditions, allowing for a larger yield within a limited space. Her mother helped by carefully adjusting the concentration of the nutrient solution and the water flow to ensure the vegetables thrived.

In terms of daily necessities, Su Yao purchased a large quantity of cleaning and hygiene products. She bought many buckets of dish soap, laundry detergent, and disinfectant; these cleaning products would keep the safe house clean and prevent bacterial growth. For hygiene products, in addition to toilet paper and sanitary napkins, she also prepared a large quantity of wet wipes, which could be used for simple cleaning when water was unavailable. Furthermore, she purchased some disposable tableware and tablecloths, so that in the later stages of the apocalypse, when water resources were scarce, the amount of water used to wash dishes could be reduced.

Energy supplies were also a key focus of the stockpiling. Su Yao collected many solar panels and batteries from the market. She and her father climbed onto the roof of the safe house and carefully installed the solar panels. These panels could convert solar energy into electricity to power the electrical equipment in the safe house. The batteries were used to store excess electricity for use on cloudy days or at night. She also purchased spare gasoline and diesel for running an emergency generator. This gasoline and diesel were stored in special metal tanks in the basement of the safe house, surrounded by fire-prevention facilities to prevent fires.

Regarding tools and supplies, Su Yao prepared a variety of hand tools and repair tools. These included common tools such as wrenches, screwdrivers, and pliers, as well as more specialized tools like welding machines and electric drills. These tools could be used to repair the safe house's facilities, weapons, equipment, and daily necessities. She also purchased some building materials, such as cement, bricks, and wood, for unforeseen circumstances, such as when the safe house needed further reinforcement or repair.

Entertainment and educational supplies were not overlooked either. Su Yao purchased some new board games and electronic entertainment devices, such as handheld game consoles. These devices were equipped with rechargeable batteries and solar chargers. She also collected more books, including some on wilderness survival, crafts, and mental well-being. These books could enrich her family's spiritual life in the apocalypse while also teaching them practical skills.

After this intense stockpiling effort, the safe house now has a more abundant and comprehensive supply of resources, making it better prepared to cope with various difficult situations in the apocalypse.