The auditorium at Lin Yue's secondary school had plastic chairs, wine-colored curtains, and a sound system that turned every sentence into a metallic echo. Lin Xuan arrived ten minutes before the science presentation began, his hair still damp from a hurried shower and the guilty feeling of someone who had escaped the hospital through an invisible window. He was not wearing a white coat. Lin Yue had forbidden him to appear as if he were doing rounds. He sat among parents holding cheap flowers and phones ready to record when his sister spotted him from the stage and raised her hand with exaggerated discretion.
Lin Yue's presentation was about the circulatory system. She explained arteries, veins, and capillaries with a mixture of nerves and pride. The model made from blue poster board and red modeling clay had one corner bent from the rain, but it worked. Lin Xuan listened as if attending an important conference. When his sister said the heart could never fully rest because any pause too long became dangerous, several people laughed at the accidental metaphor. Lin Xuan did not. He thought of Gu Qingxue, of pulses that withdrew, of besieged bodies.
After the presentation, Lin Yue ran to him with the poster board against her chest. 'Was it good?' she asked, trying to sound casual. 'Your explanation of capillaries was better than that of some interns.' Her eyes widened. 'Is that praise or an insult?' 'Both, depending on the intern.' She laughed, and for a moment she was again the child who followed him around the house with a storybook. Then she became serious with a speed Lin Xuan did not expect. 'Brother, if I got sick with something rare, would you tell me the truth?'
The question did not belong to the auditorium. It came from some half-heard conversation, from the phrase important patient, from her adolescent instinct for noticing what adults tried to hide. Lin Xuan held the edge of the model so he would not answer too quickly. 'Yes,' he said at last. 'Even if Mom got scared?' 'I would find a way to tell her without destroying her. But I would not lie to you if you could understand.' Lin Yue lowered her eyes. 'Then that patient should know too, right?' He did not ask how she had arrived there. Sometimes young people joined lines with brutal honesty.
When they left, Lin Yue insisted on buying milk tea from a stall near the school. They sat on a bench beneath young trees, surrounded by students shouting as if the future still could not reach them. Lin Xuan checked his phone by habit, but she took the device and slipped it into her jacket pocket. 'Ten minutes,' she ordered. 'Are you my superior now?' 'I am your younger sister. That is worse.' He obeyed. For those ten minutes, he listened to Lin Yue talk about a friend who wanted to study design, a boy she found unbearable, and a teacher who smelled of coffee.
The call came when they were already walking toward the bus stop. Gu Qingxue had experienced another mild episode during monitoring. The temperature data confirmed the pattern. Lin Xuan answered with brief instructions and then looked at Lin Yue. She handed his phone back without being asked. 'Go,' she said. 'I'll take you home first.' 'I can take the bus.' 'No.' The firmness in his voice allowed no argument. While they waited, Lin Yue rested her head on his shoulder for one second. 'Do not forget to sleep, even if you are the future best surgeon in the world.' Lin Xuan froze. 'Who told you that?' 'Dad. And he cannot keep secrets when he is proud.'
At the hospital, Qingxue's new data confirmed that the episode began before the pain, like a shadow entering the body's periphery. Lin Xuan asked to compare the record with administered medication and the exact time of meals. A small detail emerged: certain episodes appeared after prolonged fasting followed by light intake, when the body should have recovered balance and did not. It was not the single cause. It was another thread. He wrote it down while thinking of Lin Yue's poster board model, of red modeling clay arteries and explanations given beneath a bad microphone.
That night, before sleeping, he received a message from his sister: Do not lie to your patients just because the truth is frightening. Come to my next presentation too. Lin Xuan read both sentences several times. The system did not appear. It did not need to. Some lessons came with no rewards or points, because they did not belong to the Heavenly Medical Dao System but to something older and harder: the responsibility of looking another person in the eyes.
The rule written in the notebook solved nothing the next day. The hospital continued demanding, patients continued arriving, and time continued breaking into small pieces. But Lin Xuan discovered that an imperfect rule could work like an acupuncture needle: it did not move the world, only pressed an exact point to remind him where it hurt. Whenever he was about to hide a difficult explanation out of convenience, he thought of Lin Yue beneath the bad auditorium lights and chose to speak a little more clearly.
Lin Yue's message remained on the screen longer than necessary. Lin Xuan discovered that a sentence written by a teenager could disarm him more than criticism from a superior. Do not lie to your patients just because the truth is frightening. He read it on the bus, in the corridor, and again before entering the reserved wing. Each reading carried a different accusation. Not because he had lied, but because there were many small ways to hide a truth: delay it, soften it too much, hand it to someone else, dress it in language so technical no one could touch it.
When he saw Qingxue that morning, he did not begin with numbers. He explained what they had found so far, what was missing, what risks came with observing an episode, and what limits he would not cross. She listened without interrupting. The assistant looked uncomfortable; Director Liang was absent, and the room felt less watched by power. When he finished, Qingxue closed the notebook on her knees. 'That was clearer than the last six doctors combined,' she said. Lin Xuan did not smile. 'Clarity does not guarantee you will like what comes.' 'I do not need to like it. I need it to be mine.'
During the afternoon, Lin Xuan returned to the school to deliver a USB drive Lin Yue had forgotten. He did not enter the auditorium; he saw her from the courtyard gate, arguing with two classmates about the circulation model. She had Mei Lan's frown and Zhengguo's quiet stubbornness. Watching her, he thought that telling the truth to patients was not so different from respecting a sister who was growing up: in both cases one had to resist the temptation to control out of love.
That night he wrote an explanation for Qingxue in simple language, without erasing the severity. He reread it several times, removing decorations and phrases that sounded protective but were cowardly. The system gave him no reward. Even so, he felt he had advanced. Medicine was not only discovering what the body concealed. It was also learning to deliver that truth without using it as a weapon or hiding it like poison.
Lin Yue's question did not end in the auditorium. After school, she walked beside him along an avenue crowded with street vendors, pretending she was not proud that several classmates turned to look at her brother. "Don't make that face," she muttered. "You look like the lead in a tragic drama." Lin Xuan raised an eyebrow. "And what do you look like?" "A younger sister forced to endure social pressure because of a doctor who doesn't know how to smile in public." The joke loosened something in him. The school, with its uniforms and youthful noise, reminded him of a world where mistakes still seemed correctable with an apology or an afternoon of study. In the hospital, by contrast, some mistakes left no second chance.
They bought milk tea from a small stall. Lin Yue ordered hers with too much sugar and then stole a sip of his, claiming his tasted more grown-up. For a while they spoke of simple things: exams, a strict teacher, a classmate who wanted to study art although her parents preferred accounting. Then Lin Yue lowered her voice. "When Mom says you're fine, I don't completely believe her. She says that so I won't worry." Lin Xuan held the cold cup and did not answer quickly. He wanted to tell her everything was under control, but his sister's eyes had already grown too old for small lies.
"I get tired sometimes," he admitted. "But I am not lost." Lin Yue nodded with exaggerated seriousness, as if she had just received an acceptable diagnosis. "Then promise me that when you do feel lost, you'll at least call. You don't have to say anything deep. You can call and stay quiet." Lin Xuan felt a brief knot in his throat. The system had no mission for that. No celestial reward would teach him to ask for company without feeling weak. Even so, he lifted his milk tea like a contract. "I promise." She tapped her cup against his and smiled. That simple promise weighed more than many medical orders, but it also supported him in a different way.