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

The two elevators in the inpatient department had just stopped working, so the nephrology ward nurses called the on-call medical staff first to ask which route patients going for dialysis that afternoon should take downstairs.

Immediately afterwards, the operating room staff came to confirm whether the patient who had just undergone surgery could be sent back to the ward along the original route.

The on-call medical staff quickly rewrote the easily misunderstood points: emergency and critical care transfers will proceed as usual; routine discharges, bed transfers, and non-emergency examinations involving the eighth floor and routes with out-of-service elevators will be temporarily suspended; patients needing to travel across districts should have their names, routes, and receiving locations reported in advance by their respective departments.

Other wards will continue with their original operations, awaiting further arrangements from the hospital-level emergency response team.

In the list verification office of the administration building, Ma Hao had just pasted the notice onto the folder cover when Song Lan's phone rang.

During the route verification process at the inpatient department, the district where the Kangning Hotel is located also continued to investigate the bread truck at the back gate.

The call came from the disease control staff in charge of this line.

"We've located the van at the hotel's back gate. The owner is Wu Qingfeng, 44 years old, who does local freight. He's also the person in the gray work shirt carrying boxes in the surveillance footage; we've confirmed his identity."

Song Lan reopened the two screenshots on her computer: "It was him both times, after the morning show ended and before the afternoon show started?"

"Yes, all of them. The license plate, the freight platform order, and the payment records match up. He delivered a batch of event bags and bottled water before 8 a.m., and then moved empty cardboard boxes and remaining materials from the back door to the truck at noon. He delivered them back in before the event started in the afternoon. He had one last delivery after the event ended in the evening, to the Chengbei Business Building."

Lin Ye opened a new page and wrote Wu Qingfeng, Kangning Hotel, freight orders, and Chengbei Business Building on the same line, keeping them separate from the list of outsourced personnel inside and outside the hospital.

"Where is Wu Qingfeng now?" Song Lan asked.

"He was at the Chengbei Freight Market, and we've already asked him to stay in the car and wait. Local officials are on their way. He said he was mainly responsible for moving goods and wasn't familiar with the people participating in the event, but he took a blue file box with him after the event ended in the afternoon."

Ma Hao looked up: "Could the sign-in sheet be in that box?"

Song Lan continued, "Which floor was the file box delivered to, who was it given to, and is there a signature record?"

"Room 407, fourth floor of the Chengbei Business Building. There was no signatory's name on the freight platform, and the order contact person was still Zhou Jian. Wu Qingfeng said that the person who opened the door that night was a bespectacled staff member he had seen at the venue during the day. He put the boxes and the remaining event bags into the room and left."

The disease control staff then added, "The people from the office building are already waiting at the property management office. After receiving the contract address in the early morning, the street office and the local police contacted them. Now that the room number matches, they're going directly to room 407."

Lin Ye added Room 407 to the record, leaving the rest blank: "Wait for the local authorities to arrive and confirm. Fill in what's in the box according to their report."

The call was not disconnected.

The staff in charge of the area connected Wu Qingfeng to the call and first asked him to recall the details of his two visits to and from the meeting venue.

Wu Qingfeng spoke quickly: "Zhou Jian placed the order on the platform and asked me to go to the warehouse to pick up the goods at 6:30 in the morning. After the morning session ended, I went in to collect the empty boxes and also helped them move the bags that were to be shipped in the afternoon back to the door. I ate lunch in the car and didn't sit with the people in the venue."

"Are the staff in the morning and afternoon the same group?" Song Lan asked.

"I only recognize Zhou Jian. There's also a young man with glasses who was in both games. How could I tell if the others had changed clothes? They were all wearing pretty much the same outfits."

"Who gave you permission to take the blue file box?"

"Zhou Jian. He said there were registration forms and unused medical examination cards inside, and I shouldn't leave them at the hotel. The suitcase wasn't locked, so I didn't search it. I handed it over at room 407."

Have you had a fever, cough, or significant fatigue in the past few days?

"No. I even completed two orders today." Wu Qingfeng paused here, "You suddenly asked about the day of the event, is it because something happened at that event?"

"The relevant information will be provided to you in person by local staff. Please remain in your vehicle, wear your mask, and suspend accepting orders. You will be notified by on-site staff regarding vehicle availability and subsequent arrangements."

The origin, destination, and delivery phone number for Wu Qingfeng's two orders that day will continue to be verified by the local authorities, while the hospital will continue to investigate according to the original in-hospital list.

Wu Qingfeng sighed, muttering that the delivery fees for today's two orders hadn't been settled yet, and ultimately didn't drive the truck away.

About ten minutes later, the video from room 407 was transmitted back.

The office is registered under the name of Anhe Health Consultation Service Center. The access control phone number left by Zhou Jianliu is still switched off, and no one swiped their card to enter today.

The property management opened the door after verifying the apartment number in the presence of local staff, street officials, and local police officers. The entire process was recorded on video.

The blue file box was placed on the low cabinet against the wall.

The staff first took pictures of the box's location and sealing status, and then put on gloves before opening the box.

The sign-in sheet for the morning session was the first to be taken out; it contained fifty-six lines of names, ages, and phone numbers.

The second stack of afternoon sessions contained sixty-one sheets, with three staff meal collection records tucked at the bottom.

There are six names on the meal collection record, including Zhou Jian and Wu Qingfeng. Wu Qingfeng has confirmed that the bespectacled staff member who opened the door at night is the same person who was there for both of the daytime sessions.

The remaining four names were not previously on the hospital's or local lists, and it is still unclear which one he is.

When the photos were sent to the administration building, Ma Hao stared at the dense list of names and numbers on the screen for a long time without turning to the next one.

"More than a hundred people," he said in a low voice. "We only managed to find out a few by asking patients and their families one by one."

Song Lan saved the original photos to a separate directory: "Give the event list to the local authorities. Those who need medical assessments or have walked through the hospital's routes should not be mixed up."

Lin Ye looked at the four names that had not yet been matched with his identity, and the contact number after each name was blank.

He glanced at the meal collection times for a moment: "Let's start by checking against these four people, the one wearing glasses. Whoever collected the meal or moved supplies at the corresponding time should have their face captured on camera. Searching by name alone might not be enough to find them."

Song Lan reported this verification route to the personnel in her jurisdiction, and also sent them the original image of the meal collection record and the corresponding time period.

At 11:47, the on-call medical staff called.

"The routes taken by the two officially positive patients within the hospital have not yet been fully delineated, and there are still people on the eighth floor and in public areas awaiting testing. The hospital-level emergency response team has decided to temporarily close the loop starting at 12:00 noon, and specific travel arrangements will be sent to all departments immediately."

After the phone call ended, the hospital-level emergency response team issued a notification to all departments.

The hospital entered a temporary closed-loop management system starting at noon.

Patients, caregivers, and staff are currently registered according to their respective areas. Routine discharges and non-emergency transfers are temporarily suspended, and off-site visits are prohibited. Shift changes and cross-regional support will be coordinated by the hospital-level emergency response team. Emergency rooms, fever clinics, operating rooms, intensive care units, and obstetric emergency channels will remain operational. Patient transfers must be reported in advance, and handover will be conducted by designated personnel.

Logistics distribution, medical waste, and specimen transportation are now handled via separate, fixed routes.

Those who have already left the hospital after get off work are awaiting assessment by the local authorities and the hospital's infection control department. Those who are still in the hospital are not allowed to go home to retrieve their belongings.

When the notice was sent to the administration building, Ma Hao touched his pocket.

"I only brought my phone and charging cable." He pulled out a dorm key card. "All my spare clothes are in the dorm. If I had known it would be like this, I would have at least brought an extra pair of socks."

The staff in the administration building were registering the needs of hospitalized patients for daily necessities. Upon hearing this, they pushed a form in front of him: "Write down clearly what you need: size, commonly used medicines, charger, etc. We'll deliver it all together, so don't go out on your own."

Ma Hao picked up his watch, paused for two seconds when he wrote down "socks," and looked up to ask Lin Ye, "What did you bring?"

"cell phone."

"That's it?"

"And your ID card."

Ma Hao glanced at him and wrote an extra list for him after the quantity of daily necessities.

Lin Ye took the form, saw the one Ma Hao had filled out for him, and then added the toothbrush that Ma Hao had missed at the end.

The two individuals' locations and contact numbers were subsequently registered.

The list office and the lounge are separated by only one door, and the entry and exit registration form at the door has been updated with a new page.

At exactly 12 o'clock, access control permissions were adjusted at various locations.

The regular visitation entrance is closed, but ambulances are still entering and exiting the emergency room entrance.

A new duty roster has been put up at the east gate of the administration building, and staff members are checking each person's credentials and assigned area.

At 12:06, an ambulance drove in through the emergency room entrance.

The paramedics had informed the patient of their information and the route to the hospital in advance, and the day shift nurses in the emergency department, dressed in protective gear, were waiting at the entrance to receive the ambulance.

The stretcher bypassed the regular waiting area and went directly to the reserved emergency room.

On the other side, ordinary caregivers who were preparing to leave the hospital were still stopped at the registration point.

The two routes are separated by a movable guardrail. The emergency stretcher passes through the dedicated channel, while the regular caregivers remain in place to wait for verification.

The staff at the emergency entrance added the names of the patient, paramedic, and receiving nurse to the access log, and the log was then sent to the administration building.

Ma Hao glanced at the time and wrote "12:06, emergency and critical care channel is receiving patients normally" in the shift log.

At the same time, Song Lan's computer received the electronic version of the sign-in sheet sent back from the local authorities.

The electronic version matches the on-site photos, and duplicate attendees from both events are being screened. When flipping to the staff meal collection record, the contact numbers after four names were still blank.

The hospital has already entered a closed loop, but there are still four people whose phone numbers cannot be found from the two events at the Kangning Hotel.