After Xingyu woke up, he turned his head and saw that Miya was still sleeping. Xingyu, who doesn't know the time, also doesn't know how long they have been sleeping. After Xingyu got up and added wood chips to the stove, he went back to lie down and wanted to continue sleeping. But he couldn't sleep, Xingyu lay down and looked at the sky, thinking to himself: "Eternal day is really troublesome, there is no sunrise and sunset, and the time cannot be estimated." Xingyu looked at the position of the sun, and suddenly had a flash of inspiration. The sun doesn't stand still! It just won't set, but it will still walk in circles, and after 24 hours, the sun will still return to its original point. So we can think of the sky as the big clock and the sun as the hour hand. So we know the time. Xingyu continued to think excitedly: "We drifted to the South Pole from the Indian Ocean, so the direction of the coast is the north. The hole where the steam is coming out is in the west. And now the sun is in the east, which is six o'clock in the morning. And so on to know the time. Xingyu then thought: "Haha! It's been a few days since the time was lost. Our biological clock, which is still quite accurate, just wakes up in the morning. In fact, Xingyu's calculation of the time is not accurate. Heungwoo doesn't have a compass and doesn't know the exact direction. You can only approximate the direction and calculate the time from the position of the sun. So from the inaccurate direction, the calculated time is not accurate, but it doesn't matter. Anyway, this time is only used by the two of them.

After Mia woke up, Xingyu couldn't wait to teach Miya to see the time from the direction of the sun. Mia understood as soon as she heard this, and immediately saw that they were in the morning. Miya also shouted excitedly: "I finally know the time, it's been really hard these days, I don't know when to eat and when to sleep." ”

Except for the lifeboats, which were still on the ice field, all other usable supplies had been moved to the observation post. They are also temporarily settled, and the next thing is to solve the food problem. Although they still have about two weeks of food, they can't sit back and eat. The easiest way to get food now is to go fishing at the beach.

After the two of them finished breakfast, they picked up their fishing rods and went fishing at the beach. However, they soon found that there were not many fish here, and only three fish were caught in the morning. If this continues, they will definitely not have enough food. While eating lunch, Heungwoo thought about continuing to explore the ice field here, stopping by to see if there was a food source. But first of all, we had to bring the lifeboat back. There are many storms in Antarctica, and lifeboats placed on the ice field will be destroyed by the storm sooner or later.

The next morning, they returned to the lifeboat. Before they came, Xingyu had already figured out how to transport the lifeboat to the observation post. Xingyu first deflated the lifeboat, and then rolled the deflated lifeboat into a long strip. Put it on two trolleys and you can transport it back. On the way back, they also went rafting. They stuffed the trolley compartment with pillow cloth bags stored in the living compartment. Then we departed for the Observatory. They also brought back the pillow sack because they wanted to burn it as fire. There were too many cloth bags, so they decided to burn the cloth bags first to keep warm. Finally, wood chips and strips are used. Now they don't use lifeboats, so when they return to the observation post, they don't turn on the inflation. Instead, they went straight into the studio and kept it. Now that the lifeboats have been moved back to the Observatory, they have to continue exploring the ice fields.

The next morning, when they were ready, they set out to the east of the ice field to continue their exploration. They still walked along the third level of the ice field, so that they could see farther. It was still the same silence all around, except for the faint sound of the waves coming from the seashore. They walked without notice for a long time, and after lunch, they continued walking. Suddenly they saw a black object on the shore. Curious, they climbed down the hill towards the object. As they approached the shore, they saw the object clearly and immediately rushed over with joy. The black object turned out to be their lost military inflatable boat. After pulling the inflatable boat up the ice field, they began to inspect the inflatable boat. The inflatable boat was completely undamaged and could continue to be used. But they still have to go further, so they can only put the inflatable boat on the ice field and press it with ice. When they returned, they brought the inflatable boat back. They climbed up the third ice field and continued along the hillside. The next morning, it wasn't far away. They came to the end of the ice field. At the end is a large bay where the ice sheet is cut off, and they are like standing on a cliff.

Although Xingyu and Mia are not familiar with geography, they can also see that this bay is peculiar. It is not like a naturally formed bay, but rather a bay formed by the sea water rushing into a hot ice field after melting a stretch of ice. The waves in the bay hit the base of the towering icebergs. When Xingyu looked at the waves hitting the foot of the mountain, he was surprised to find that there was a huge cave under the waves. The sea flooded the entire cave, and if you didn't look closely, it would be difficult to spot the cave under the waves. At this time, Xingyu remembered the canyon and the wind tunnel. If the vapor continues to dissolve the valley floor of the canyon, when the valley floor is low enough for seawater to rush in. Then it will turn into another bay. Thinking of this, Xingyu looked up at the towering iceberg in front of him in surprise, and couldn't help but exclaim: "Could it be that this iceberg is an active volcano?" Mia also saw that the situation was wrong, and heard Xingyu's exclamation again. Mia also exclaimed: "No wonder the observatory will be abandoned, the observatory is simply located in the ice field at the foot of the volcano!" It is likely that the observatory was set up to observe the volcano. Mia thought about it again, and her face turned even pale: "They must have found that the volcano is very active, and they speculated that the volcano was about to erupt, so they evacuated the observation post." The two looked at each other in panic, and Xingyu immediately thought deeper and said: "If this towering volcano erupts, the huge waves generated by the collapse of the entire volcano and this ice field and the sea are probably no less than a tsunami." ”

Xingyu and Mia knew in their hearts that the moment of the eruption of the volcano was not far away. They must find a way to leave as soon as possible. Otherwise, a volcanic eruption alone would be fatal to them. Not to mention the collapse of the ice sheet and the resulting tsunami.

They immediately set off for the Observatory to find a way to escape.