On the beach, Li Ling returned with her fish basket and said, "There are only four fish this time, one more than last time." Wang Lun said, "It's okay, it's normal. I usually only catch three or four." Li Ling asked, "Do you think the fish are about to disperse? Otherwise, I wouldn't only catch so few each time." Wang Lun said, "That's for sure. We can't rely on this school of fish forever. Besides, even if we want to, the organizers don't want to either." Li Ling smiled and said, "That's true." Wang Lun said, "Do you remember how many fish we have now?" Li Ling said, "Including these three, that makes exactly three hundred." Wang Lun ate a... "So many?" Wang Lun exclaimed in surprise. Li Ling replied, "Of course! With the catch from each fish basket and the dam you built by the sea, three hundred fish wouldn't be an exaggeration." Wang Lun smiled and said, "That's true, but more is always better." Li Ling asked, "What are you planning to do?" Wang Lun said, "I plan to build a sturdy shelter and a wall when I get back. That way, we can hold out for longer." Li Ling became interested and asked, "Do you have any ideas? How many days will it take?" Wang Lun said, "I have some ideas. I estimate it will take about half a month to twenty days." He then explained his plan for the shelter to Li Ling.

First, regarding the shelter, Wang Lun decided to build a mud-walled house, estimated to be six or seven meters long, four or five meters wide, four meters high at its lowest point, and five meters high at its highest point. Of course, these dimensions were estimates and wouldn't be very precise. He planned to dig two or three meters into the existing earthen slope behind the shelter and use that earth to build a 30-centimeter-thick mud wall, connected by horizontal and vertical wooden strips, with the vertical strips buried in the ground. At the entrance, he would build two layers of 50-centimeter-thick mud walls, leaving a space in the middle for a heavy wooden door, entirely made of rough wood. Afterward, he would build a 20-centimeter-thick earthen embankment next to the door to prevent any crawling animals from getting in. Inside, he would build another inward-opening door, but due to its location, it would only open at a 90-degree angle. The position was calculated beforehand, leaving a bamboo tube at the top and bottom, and the door would be installed simultaneously with the wall construction. Finally, at the back of the inner part of the shelter, he would add a sloping door woven from weeds to provide shelter from the wind and rain. The same procedure is followed at the reserved window locations, except with a thick wooden wall inside that can be opened and closed, with the window opening outwards. A bamboo tube is placed on either side of the window wall beforehand for opening and closing, and this is installed along with the earthen wall. The overhead beams will be made of thick timber, with a groove pre-reserved in the earthen wall to prevent slippage; there will be a total of five beams. Then, some branches will be laid vertically for added stability. A layer of large leaves will be laid, followed by a layer of thatch, then a 10-centimeter layer of soil. After it dries, another thick layer of thatch will be added. With these multiple measures, it should be leak-proof. A heated kang (a traditional Chinese bed-stove) will be built inside the room, against the wall, forming a large communal sleeping area. In winter, the kang will be lit, and no matter how cold it is outside, I won't get off. A stove will be built for cooking inside, with a chimney for ventilation; the location will be reserved in advance, and the chimney will be constructed. As for the outer wall, it will be 50 centimeters thick and 3 meters high, with the entrance also reinforced and equipped with double doors. In the yard, dig a large pit, pave the sides with stones, build a 50-centimeter fence around it, and then divert water into the yard. That's it! As for the toilet and such, we'll build those later when we have time. By the time we finish these projects, we'll probably have eaten some of the food, so the next step is definitely to find and store food.

Upon hearing Wang Lun's description, Li Ling's first reaction was how incredibly cowardly he was. A wall half a meter thick and three meters high, reinforced with branches—even a bear would be stunned if it crashed into it, let alone the double gates of the wall and the shelter itself. Her second thought was how long it would take to build. So she asked, "Are you sure you can finish it in half a month according to your plan?" Wang Lun nodded and said, "If the weather is good, it can be completed. I've made a detailed plan; let me explain it to you." First, Wang Lun planned to spend a day bringing water to the area around the shelter, and another day building a wooden fence around it to prevent accidents during construction. This would essentially complete the preliminary work. The biggest problem was food, but that had already been solved. Six days would be spent digging, with intervals for ramming the earth to build the walls and perimeter fence—this would take about four days. One day would be spent felling and transporting timber, mainly the crossbeams. Two more days would be spent building the roof. That's only fifteen days in total, plus five extra days for the plan, making it twenty days in total. After listening to Wang Lun's explanation, Li Ling asked, "Is this the workload for two people? Are you sure it won't kill you?" Wang Lun said, "It's okay, I've estimated it, we can handle it now. If we live on the island for another month, the plan will have to be extended by at least ten days, and that's assuming we have enough food. Without enough food, I'm afraid we won't be able to finish in forty days." Li Ling thought about it and realized it made sense. It was only the fourth day, and they had been eating until they were stuffed every day. No wonder Wang Lun said not to worry about gaining weight; he probably had it all planned out. Li Ling said, "Okay then, I agree, but I'm still a little worried about my stamina." Wang Lun said, "It's okay, I've calculated it, don't worry." Li Ling nodded. Wang Lun said, "Okay, I'll go carry the bamboo I found on the beach." Li Ling said, "I'll go too." Wang Lun said, "No, you stay here. You need to collect the fish baskets and look after the food." Li Ling said, "That's too easy for me." Wang Lun laughed and said, "Let you rest first, you'll be exhausted when we build the camp." Li Ling laughed and said, "I'll definitely exhaust you first." Wang Lun chatted with Li Ling for a bit, then said goodbye and went to carry the bamboo. If there was bamboo near the shelter, Wang Lun wouldn't want to go so far to carry it.

In the live stream, a group of netizens were shocked upon hearing Wang Lun's construction plan. "If this is built, it could probably last for decades!" "My hometown is in the countryside; we used to live in mud houses. My grandfather lived there from his generation to mine, and they're still standing." "What are you thinking? As long as someone lives there, it won't collapse. My family's houses were all demolished by my dad and a few people." "To be honest, mud houses are warm in winter and cool in summer. Modern brick houses are unbearably hot in summer and freezing in winter." "Exactly, I can't live at home without air conditioning." "Yeah, but central air conditioning is so expensive." "Why do you have central air conditioning? Aren't they all wall-mounted?" "Uh, don't you live in other..." "A villa? Don't they say rural people all live in villas?" "Wow, rich guys!" "Everyone's joys and sorrows are different." "Down with the 'small life'!" "Haha, bro, you've got the wrong channel." "Aren't you guys worried they won't build it well?" "Worried? I'm worried they won't build it." "Exactly, they have so much food, at worst, they'll just take a little longer to finish." "Okay, looks like they're determined to live in these mud-walled houses, even Jesus can't stop them." "Actually, I still want to see that half-meter-thick wall." "Me too, and I'd love to see if a bear could knock it down."...

The group in the live stream were all very confident in Wang Lun and his team's ability to build the mud house; almost no one thought they couldn't succeed. After all, with enough food stored up, they could do whatever they wanted.