On the morning of the third day after leaving the wall, only 12 of the 19 teams that set out were left.

As usual, after taking a headcount in the morning, Ji Lan said, "Team 1 is expected to leave the orange line around 2:00 PM this afternoon. After leaving the orange line, teams will no longer need to rescue each other. I hope each team will fully consider their own situation before deciding whether to move forward."

After the morning meeting, Xie Xuan and the others were about to set off again.

After a night's rest, Ding Qiaoyun's condition did not improve.

Xie Xuan called Xiao Yao to the front of the car and discussed with Chongming, "After arriving at the C7 station, let Ding Qiaoyun go there for treatment."

Xiao Yao and Chongming had no objection. "I don't know if there are any teams in the garrison that have returned to the inner wall. It would be best to let Ding Qiaoyun go back to the inner wall to recuperate."

Song Zhixian, who happened to hear this as he walked over, said, "The first group of teams will probably return to the wall in a few days."

The others looked at him, and Song Zhixian explained, "The team at the garrison left the wall two days earlier than the pioneering team. Generally speaking, the logistics personnel with lower ability levels have to return to the wall for rotation every week or so. Today is your third day outside the wall. In two or three days, there will be another team returning to the wall."

Xie Xuan was a little worried, "Is it safe?"

Song Zhixian said, "Generally speaking, it's safe because they will return along the same route you took, Route 18. However, no one can guarantee that there won't be any unexpected dangers along the way."

But there is no better way now.

You can't go back to the wall whenever you want. According to Ji Lan before they set off, once you choose to go back to the wall, you can't go out again this year.

Although Xie Xuan didn't know why this rule was made, it was not easy to get out of the wall. The exit of the high wall in District 6 was completely controlled by the District 6 Ecological Bureau.

Not to mention individuals, even the leaders of District 6 who want to enter or exit the high wall have to report to the District 6 Ecological Bureau for approval one month in advance.

After the four of them discussed it, they returned to the rear end of the carriage and Ding Qiaoyun had just woken up.

Her complexion looked very ugly, pale and bloodless, with dark circles under her eyes, a bit like when Xie Xuan first saw her.

But the first time they met was because Ding Qiaoyun had been working overtime for several days in a row, and now it was because of the serious sequelae of the infection.

The medical resources on board are very limited. Severe infections can damage human organs and leave physiological lesions in the brain, forcing those who manage to escape the field to live in a nightmare for the rest of their lives.

Ding Qiaoyun sat up, smiled slightly, and said, "I'm sorry I couldn't help you at all and I'm holding you back."

"No." Xie Xuan said, "Xiao Yao and I are so unlucky that we have implicated you."

Xiao Yao, who was inexplicably cueed, said innocently: "I think you are more unlucky."

Chongming said, "After we reach the C7 station, you will stay there to rest. When the team at the station returns to the wall, you will follow them back to the wall to recuperate."

Song Zhixian nodded and said, "Don't worry. Although the medical equipment in the station is not as abundant as inside the wall, it will be no problem to control your infection symptoms."

Ding Qiaoyun sighed, her eyes shifting from unfocused to focused on Xie Xuan. "Sorry."

Xie Xuan didn't know what Ding Qiaoyun was apologizing for. Was she apologizing for having to leave early because she couldn't help, or for approaching her with a purpose, or for Yang Jiayue's death.

But it doesn't matter which one it is.

Xie Xuan looked at Ding Qiaoyun and said, "I hope you can live well."

Ding Qiaoyun nodded, "I will."

At their current rate of advance, they should be close to the red line when the team in the base returns to the wall in two days.

The red line is the maximum range of communication support that Bai Ze inside the wall can provide. If they leave the red line, they will become a completely isolated island.

They couldn't stay within the red line for long, which meant they couldn't receive any news about Ding Qiaoyun's return.

"We'll have dinner with you after we return to the wall." Xiao Yao said, "I said it before."

Ding Qiaoyun's eyes suddenly felt warm. Although she and Xiao Yao had not gotten along before, she seemed to have forgotten their previous confrontation. "Of course, I'll wait for you to come back."

At two o'clock in the afternoon, Ji Lan's team reached the orange line as planned, and they had arrived at the second mission sample collection point.

Team 1 was the fastest advancing team, not because their car was driving so fast, but because they encountered almost no trouble in the area.

Compared with Xie Xuan and the others, their luck is just like that of a European emperor and a non-European emperor.

Xie Xuan and the others didn't encounter any danger that morning.

But this was not because their luck suddenly improved, but because they were approaching the garrison, and the area nearby was a place where the garrison team frequently came and went.

Just like a minesweeper game, the surrounding areas have been stepped on by people, and it is safe for people to step on them later.

Team 16, who were supposed to arrive at the C7 outpost around 10 a.m. today, were unfortunately wiped out last night, leaving only their team to head to the C7 outpost.

When Ji Lan completed the mission and walked out of the orange line, the shadow of the C7 base finally appeared in the sight of Xie Xuan and others.

When Xie Xuan came back from District 13, she had seen these white towers standing in the mushroom forest outside the wall from another perspective, but when she walked in from a different perspective, she felt even more shocked.

Like the Ecological Bureau inside the wall, the C7 garrison is also pure white. However, unlike the spotless and fake-looking white of the Ecological Bureau, the white of the C7 garrison looks a bit old and shows signs of age.

When getting off the car, Xie Xuan asked, "Are the Ecological Bureau building and the C7 base white because of Bai Ze?"

Song Zhixian followed Xie Xuan and heard this: "The Ecological Bureau building is, in essence, all the Ecological Bureau buildings within the wall are infected by Bai Ze, so Bai Ze's voice can be heard in any corner inside."

He coughed a few times and said, "But the garrison is not like that. It's white only because it was built with special white anti-infection materials. There is no Bai Ze in the garrison."

Xie Xuan nodded.

But after Song Zhixian got off the car, he turned around and glanced at Chongming who was walking at the end of the team, "But now Bai Ze is here."

Xie Xuan didn't know if this could be considered a cold joke, but someone from the garrison had already come out to greet them.