After a long time, Zhao Yan woke up from a coma, and what woke her up was a chill to the bone.

In the desert in summer, the temperature difference between day and night is very large, because the specific heat capacity of the sand is very small, the temperature can rise to 50 or 60 degrees Celsius very quickly after the sun is irradiated during the day. At night, the sand quickly releases its own heat, and the temperature can be as low as 10 degrees Celsius. Zhao Yan was only wearing a very thin T-shirt, how could she not wake up from freezing?

Zhao Yan stood up slowly and looked at her watch, it was already 2:40 in the middle of the night. After three or four hours of sleep, she felt some strength, but she still felt thirsty and hungry.

During the day, in order to resist the heat, she drank the water she weighed, but the water was not stored by her body, and most of it was evaporated from the surface of her skin after only one turn in her body. To avoid drinking more water, she also reduced the amount she ate.

Zhao Yan turned on the flashlight and silently counted the amount of drinking water in her bag.

There were still twenty-two bottles left, and Zhao Yan's face darkened slightly, which showed that she had drunk nearly half of the water on the first day, which was the result of her later efforts to control it. In this case, there will be an average of only eleven bottles of water to drink every day tomorrow and the day after tomorrow.

Zhao Yan paused, took out some high-calorie biscuits from her bag, then opened a bottle of water and began to eat. After a while, a few biscuits and a bottle of water went down, and Zhao Yan felt that her body had regained some strength. However, there are only twenty-one bottles of water left.

Feeling the cold and dry airflow, Zhao Yan wanted to take advantage of the dark night to hurry. But she soon gave up on the idea. Because although he has regained some physical strength, he can still walk ten or twenty kilometers at most. After that, I am bound to burn out. And then, the most vicious sun will come. Zhao Yan couldn't be sure if she still had the strength to carry the scorching heat of the day at that time, even if she sat still, she couldn't be sure.

After thinking about it, Zhao Yan decided to continue to rest. took out the sleeping bag from her bag, and Zhao Yan gently got into the sleeping bag. It was the first time in her life that she had slept without taking a shower. There will be a second time tomorrow night, Zhao Yan smiled self-deprecatingly and fell asleep. She didn't have much time to rest, only about two hours left.

In the morning, Long Qing got up early, this is his habit, and he will not change it because he doesn't have to exercise in the morning. After washing up, when I went out to eat some breakfast, I saw Lin Raorao standing at her door, with a slight dullness around her big watery eyes, obviously she hadn't slept well all night.

"Let's go, come with me to have some breakfast!" Long Qing said.

Lin Raorao nodded, followed behind Long Qing, and walked out of the hotel.

Breakfast in the northwest is not like steamed buns and porridge in the south, and there are more restaurants such as noodles and mutton soup. Long Qing asked for a bowl of mutton steamed buns with local characteristics, and ate them with relish. When he was about to finish eating a bowl of steamed buns, he looked up at Lin Raorao, and a piece of naan in his hand had just gnawed a small gap.

Long Qing sighed and didn't say anything, she knew that Lin Raorao was worried about her senior sister Zhao Yan.

"Master, where did you say Senior Sister is now?" After a while, Lin Raorao couldn't help but ask out loud.

Long Qing said: "With what I know about him, she should have walked almost half the distance by now, that is, she is still fifty kilometers away from us." ”

"Really?" Lin Raojiao's eyes lit up, and a moving look instantly burst out on her face, "That's great, isn't it that we can see Senior Sister by this time tomorrow morning." ”

"It's not that easy, silly girl. Long Qing sighed, "Yesterday, your senior sister traveled lightly, and her physical strength and spirit were the fullest, so she might walk fifty kilometers in one day." But today, after the ravages of yesterday's day, her physical strength and spirit can be as good as the usual six achievements, that is, she can only walk another thirty kilometers at most today. By tomorrow, even less. This 100-kilometer journey is an extreme challenge, and if it is easy to complete, it cannot be called an extreme challenge. ”

Lin Rao's little face darkened suddenly, and she was silent for a moment before muttering to herself: "I believe that Senior Sister will definitely be able to do it, and she will definitely be able to do it." ”

After breakfast, the two walked out of the shop. Lin Raorao stood on a small building in the middle of the town and looked into the distance, a round of red sun just showed half of her head, dyeing the distant desert into an orange-red.

"Senior sister, you must come on!"

In the desert, Zhao Yan seemed to hear Lin Raorao's voice, sat up from the sleeping bag, glanced at the orange sun, Zhao Yan quickly stood up, and packed the sleeping bag and all the things.

I glanced down at my watch, and it was already six twenty o'clock. Zhao Yan was a little remorseful, originally, according to her plan, she should have gotten up at half past five and taken away a little while the weather was cool. But, apparently, she slept too much to hear the alarm clock she had set at all.

Now the temperature has reached about twenty-five degrees, Zhao Yan does not dare to stay at all, she knows that it only takes less than half an hour for the temperature to rise to more than thirty degrees. She had to race against the clock.

She stretched her long legs and walked forward with difficulty, step by step. Today, she clearly felt that her legs were very sore and tired, and that it took longer to take a step than yesterday.

"Well, today it only takes thirty kilometers, only thirty kilometers. She kept cheering herself up.

The temperature in the desert rose very quickly, and sure enough, after just over 20 minutes, the temperature rose to 30 degrees Celsius or more, and it continues to rise. Sweat began to pour out a lot again, Zhao Yan felt extremely thirsty, but she didn't dare to drink water, because there were only 21 bottles of water left, and today she set a share of ten bottles for herself, according to the plan, before eleven o'clock, he planned to drink a bottle of water every two hours, and between eleven o'clock to six o'clock in the afternoon, he drank a bottle of water every hour, and now, it was only less than half an hour.

The sun rises slowly and inexorably, unleashing its energy to its fullest.

Zhao Yan felt extremely thirsty, and put her hand into her bag several times, and finally retracted it. She knew that once she indulged at this time, she was afraid that there would be countless reasons to continue to indulge later, and when the time came, it was a question of whether the water would survive today.

"I'm going to refrain from it. Zhao Yan felt that there was no trace of saliva in her mouth, and the sweat on her body was slowly decreasing. At the same time, without enough water to regulate her body temperature, she felt like she was about to burn.

"Well, there are fifteen minutes left, hold on, hold on!" Zhao Yan gritted her teeth, countless black and white phantoms had begun to flash in front of her eyes, and the whole person was crumbling, and she was about to fall to the ground at any time.

"It's time!" When she saw the minute hand pressed on time on 0, Zhao Yan sat down and stretched her hand into her bag.