When I'm on the night shift, all the department heads can't sleep.

After the person on the other end of the phone said, "It's basically full," Li Qian glanced at the time on the wall.

It was nearly midnight.

The night shift receptionist at the Corning Hotel can only find so much information; to search further, you'd have to find the person in charge of the venue that day.

"Are the rental registrations for the morning session still available?" She turned the phone to her own face. "Contracts, payment records, inbound and outbound records—find whichever you can first. Keep the surveillance footage on, but don't cover the second-floor corridor, lobby, or parking lot. We'll have the duty officer connect you with your manager."

Upon hearing that CCTV footage was being recorded, the receptionist's tone became noticeably tense: "Has something happened during the event? We still have guests at the hotel; should we notify them now?"

"Regarding the joint activities at the nuclear facility, the specific conclusions are not yet available. Please contact the duty manager first. As for the arrangements for others, we will wait for notification from the local CDC. If you spread the information yourself now, it is easy to confuse the time and the number of people involved."

After the phone call was handed back to the duty officer, Li Qian added a monitoring retention time to the form.

She had just finished writing when the landline next to her rang again. The duty officer had already brought in the duty manager of the Kangning Hotel.

The manager was woken up at home and was still sleepy when he spoke.

He recalled that Anhe Health had rented the venue twice, and the business contact person was Zhou Jian. Each time, he would bring people to set up the display stands a day in advance.

The venue fee from last Sunday was transferred from a personal account. The contract was stamped with the seal of Anhe Health Consultation Service Center, but the original paper copy was locked in the finance office and could not be obtained by the night shift receptionist.

"Besides this switched-off number, does Zhou Jian have any other ways to contact him?" Xu Mingzhe asked.

"The contract should include the office phone number. There's also a bread truck that delivers event materials; the license plate is in the registration form at the back gate. I'll have the finance and security captain look for it when they arrive tomorrow morning."

Li Qian continued, "Don't wait until tomorrow morning to save the surveillance footage. The duty manager should now notify security to back up the relevant recordings from 8 AM to 6 PM last Sunday separately. Also, save the contracts and vehicle registrations completely, without altering the original content. Make a note of who accessed them and when."

The manager agreed quickly this time, and asked again before hanging up whether the hotel needed to be locked down.

Li Qian told him to wait for notification from the local authorities, and then handed the phone back to the duty officer.

The cleaning area was quiet for a moment, with each of the three observation positions on the monitoring screen occupying one space.

Gao Limin was coughing against the headboard, Shao Dequan was taking his blood pressure, Xu Wenliang was still wearing his oxygen mask, and Luo Wenbin was leaning over to check the monitor beside the bed. The monitor was muted, and after a few seconds, the internal line brought in the sounds from the observation area.

"Xu Wenliang coughed for a while after turning over, and his blood oxygen level dropped to 91, but it's back to 93 now." After reporting the changes, Luo Wenbin added, "He's not suitable for prolonged questioning tonight. Provide as much supplementary treatment as possible to his family."

Xu Mingzhe agreed and instructed the second-line respiratory specialist to keep the phone line open.

Further treatment and admission will be determined based on the results of the follow-up examination. In the clean zone, we will first complete the list of companions for the three patients.

The inside line from Gao Yuan's observation position quickly came in.

He had already asked the property management of the residential complex, and the person living in the next unit, whom Gao Limin usually called "Old Gu," was named Gu Shoucheng, and was 65 years old this year. Last Sunday morning, Gu Shoucheng went downstairs to call Gao Limin, and the two of them then took the same bus to the Kangning Hotel.

"My dad used to have his number saved, I just called, but no one answered." The sound of scrolling through contacts came from Gao Yuan's end. "The property management said his son's family lives in the south of the city and doesn't usually live with the elderly. Can I send you both numbers?"

"Give it to the registration nurses on the outside, and clearly write down the source of the number." Lin Ye paused, then asked, "Besides Gu Shoucheng, who else went with them?"

"My dad said it's just the two of them. He's willing to talk about it now; before, he was afraid I'd find out he went to a health product seminar."

Gao Yuan's words were still tinged with anger, but he was separated from his father by the observation area and couldn't even see him.

Lin Ye let him finish complaining and asked him to leave the property management contact person as well, so that the infection control department and the local authorities could continue to investigate.

There has also been progress on Shao Dequan's lead.

Chen Xiulan took the phone that Shao Dequan had left on the outside and looked up the call records from last Sunday morning.

One of the numbers called at 8:06, and the caller was identified as "Old Peng".

Shao Dequan admitted over the intercom that the other party's name was Peng Jianye, a former colleague from his factory, and that Peng Jianye had delivered the activity coupons to his home.

"What's his relationship with the organizers?" Li Qian asked.

"How would I know?" Shao Dequan coughed twice, his reply sounding a bit annoyed. "He said if we gathered enough people, we could get an extra can of oil, and told me to come sit down. When we got to the hotel, he helped the people at the door hand out bags for about ten minutes, and then he came in with me to listen."

Chen Xiulan, who was outside, heard it clearly and immediately replied, "You didn't mention there was still a barrel of oil when you came back."

"We haven't gotten the oil yet, and we don't have enough people."

"What time is it, and you're still thinking about oil?"

Li Qian and the other person stopped, singled out Peng Jianye, picked up another phone, and reported directly to the duty officer: "This person participated in the morning session and even handed out bags at the entrance. When transferring him to the relevant department, explain the situation separately and verify how he contacted the organizer."

Lin Ye added Gu Shoucheng to the list of attendees and noted after Peng Jianye's name that he would be attending the morning session and would be receiving activity bags at the entrance for about ten minutes.

A layer of light blue text then appeared at the edge of my field of vision.

[Risk Factor: The number of people with common exposure continues to expand]

[Key gaps: List of on-site staff, whereabouts of attendance records, staff shared by the morning and afternoon sessions, and participants who have shown symptoms]

The notification faded quickly.

Lin Ye looked at Li Qian: "When the hotel records the video, mark the part before and after the midday changeover separately. If it's the same group of staff in the morning and afternoon sessions, the afternoon staff will also have to be brought back."

Li Qian understood what he meant, and dialed the hotel again, asking the duty manager to keep the video recordings of the lunch break, the rearrangement of items, and the entry of people in the afternoon session, and to check the vehicle registration at the back door for the whole day.

The form in front of Li Qian was still mostly blank. There were no answers yet regarding who had sat in those fifty-six chairs or which staff Zhou Jian had brought with him.

The duty officer forwarded the information of Gu Shoucheng and Peng Jianye to the local disease control center.

Li Qian then contacted the hospital's laboratory department to inquire about the progress of the remaining respiratory specimens' testing.

The staff on duty verified the number and explained that the common respiratory pathogens test was still ongoing. All three samples had been preserved as required, and they would call back once the results were available.

As the clock on the wall struck midnight, Lin Ye realized that he hadn't eaten anything since evening.

The emergency call went off at that moment.

After reporting the situation in the outer triage area, Nurse Zhao asked him, "Is that food container in the refrigerator in the rest room yours? It has your name on it, and Nurse Zhu specifically pointed it out to me during the shift handover."

"My mom installed it this afternoon."

"Are you able to come back tonight? The food's been sitting there, and I don't know how we'll hand over the shift tomorrow morning."

Lin Ye glanced at the door between the clean zone and the buffer zone.

The personnel routes have already been separated, and it is clearly inappropriate for him to go back to the emergency room to get a meal.

"You guys share it. If the doctor on duty in the second consultation room hasn't eaten yet, save some for him too."

Nurse Zhao chuckled, "Your mother worked so hard to make this, and you're being quite generous."

"It would be a waste to leave it until tomorrow. I'll leave the lunchbox in the break room for now and get it when I can go back."

"Okay, I'll clean you up. If you can't leave right now, find something to put on your back. Don't wait until you have low blood sugar and have the fever clinic add a bed for you."

After hanging up the phone, Qin Hai took out two packs of soda crackers from the cabinet and tossed one pack to Lin Ye.

"Eat first. This matter won't be resolved tonight."

Lin Ye tore open the packaging. The biscuits were a bit dry. After eating the second one, he picked up a paper cup to get some water.

The message Ma Hao sent me a dozen minutes ago was still on my phone.

The residency training group told those who are supposed to be assisting tomorrow morning to wait for further notice. Should I go or not? I set three alarms, but the department hasn't sent out the reporting location yet.

Lin Ye replied: "[Turn on your phone, go to sleep first. Follow the designated entrance when the notification comes in; don't go to the hospital prematurely.]"

Ma Hao quickly replied with "OK," followed by: "Have you eaten anything?"

Lin Ye glanced at the cookies on the table and replied, "I'm eating."

As he put his phone away, a call came in from the local CDC, connecting him to the clean zone.

Gu Shoucheng's son has just made contact with his father.

The elderly person started feeling cold around 9 PM tonight. Their temperature was taken twice at home, with the highest being 38.4 degrees Celsius. They also started coughing.

The elderly man usually lives alone. His son is on his way from the south of the city. The local authorities told him to wait downstairs and not to go directly into the house.

Sampling and assessment have been arranged nearby, and family members who have recently been in contact with him will have to wait for further notification from the local authorities.

Li Qian flipped through the "Gu Shoucheng" column and added the time of chills, highest body temperature, and cough.

The sign-in sheet is still in the hands of the organizers who have lost contact, but another participant has also developed a fever.