Amina’s invitation did not mention Yansheng until the fourth paragraph.
A regional engineering group was organizing a workshop on industrial power reliability. Operators, maintenance workers and a few outside specialists would compare lessons from recent equipment trials. The organizers wanted someone who could explain how changing the reporting boundary altered a performance claim without accusing the instrument of lying.
“I thought of your workshop example,” Amina wrote. “The one with the anonymous plots. Would you present the method, not the case?”
Yanchuan read the email twice. A ticket to Kenya had become, in his mind, a chance to stand closer to the last place his brother might have been seen. He could call the trip professional. His employer might even pay part of it.
He phoned An before answering.
“What do you actually want to do there?” she asked.
“Present the comparison. Meet the people who have been working on the corrected test. Perhaps speak to Wanjiru.”
“Those are three different things.”
“I know.”
“Then make three arrangements. Don’t say a workshop will find Yansheng.”
She was not trying to stop him. He knew that. She was asking him to distinguish the invitation he had received from the journey his hope had already begun to assemble.
Chen reviewed the proposed talk. The engineering firm could release the anonymous domestic demonstration and its method. It could not release customer data from the factory pilot or restricted records from Kenya. The talk would need a statement of that boundary.
Guo offered to sponsor travel if Yanchuan would add a session about commercial flexibility contracts. Chen declined to combine the two without a separate agreement.
“We can present engineering lessons,” he said. “We won’t use a missing-person inquiry as an introduction to prospective investors.”
Guo accepted the limit with a brief smile.
Amina wrote that the workshop’s local engineers would set the practical agenda. She asked Yanchuan to send questions in advance, not arrive with the assumption that people had gathered to explain their site to him.
He drafted a list. How should an operator document excluded auxiliary demand? Which records let a later reviewer reconstruct a test? Who signs a change in conditions, and what does that signature mean? Then he added a separate heading, questions for the case team, and moved every item about Yansheng beneath it.
The document looked less dramatic. It was easier to share.
When the dates arrived, Yanchuan checked work, leave and expenses. The trip would be shorter than his first. There would be a return ticket he could afford without using his father’s savings, and a clear purpose if the family inquiry produced no new meeting.
Qiao called from the hospital as he was pricing flights.
“Don’t arrive exhausted again,” she said. “You won’t be useful to anyone.”
“Are you my doctor now?”
“No. I’m your sister. It’s cheaper.”
She asked about their father. He was doing better with his wrist but had resumed repairing neighbours’ appliances before anyone agreed on how much work he should take. They made a plan to discuss it with him without treating him as an object they could manage.
At the next family review Wanjiru said an in-person meeting with the case contact might be useful if it coincided with the trip and was formally arranged. She cautioned against approaching staff at the annex independently.
Yanchuan did not need her to repeat the warning about arriving at a gate with a folder full of questions. He thanked her and asked for an appointment through the established process.
Amina confirmed the workshop schedule. The speakers included technicians who handled maintenance records, a local procurement specialist, an operator responsible for safety limits and an engineer working on storage dispatch. Yanchuan would speak last, after the people whose daily work gave the calculations meaning.
“I used to think the presenter was the most important person,” he told Mei.
“You still like explaining,” she said.
“That isn’t the same thing.”
“Not always.”
At home he packed the spare power adapter from his first journey. It still worked. He put the returned travel-expense reconciliation in a separate folder and left the family chronology on the shared drive where An and Wanjiru could access the relevant version.
The invitation was a professional opportunity. It was also a journey to a country where his brother had gone missing. Both facts would travel with him. Neither would give him authority the other did not provide.
At the airport An sent a picture of their son standing beside a rebuilt bridge. The boy held a sign saying TESTED WITH BUS. He had made the letters unevenly, and one corner of the sign curled toward the floor.
Yanchuan sent back a photograph of his boarding pass with the personal details covered.
“Tested with airplane?” the boy asked.
“Not by me,” Yanchuan replied.
When the plane rose, the city disappeared beneath cloud. He had left before with the feeling that every kilometre was a duty to his brother. This time he had a schedule, a talk he could defend and people who knew how to continue the search without him.
He was still afraid of what he might find.
His talk was saved on the laptop, with one slide naming the limits of his own experience. He left it there when the flight attendant asked him to close the screen.