Chapter 49: Thresholds and Echoes

Wednesday. Morning. 07:30. Dormitory. Lin Chen opened his eyes. No alarm clock. His body clock was exact. The crack in the ceiling was clear. Thick frost crusted the window glass. The edges had gone white. He sat up. Got dressed. Every movement was light. His feet touched the floor. The soles of the new rubber boots were stiff. He walked to the window. Pushed it open a slit. Cold air poured in. It carried the smell of coal smoke. The athletic field in the distance was empty. Snow on the track had been trampled into a mix of mud and ice. He drew his hand back. Closed the window. Checked the canvas bag. Zipper. Fastened. Hot-water bottle. Side pocket. Motion-sickness pills. Inner pocket. Exam admission slip. In the lining. He checked them one by one. The weight was even. No strain on the shoulder.

He washed up. Cold water. Piercing. He scrubbed his face. The towel was rough. It rubbed the skin. Left red marks. It did not hurt. It woke him up. He walked back to the bed. Sat down. Took off the boots. Undid the laces. Shook out the cardboard inserts. The gauze on the soles of his feet was dry. The edges of the cracks had scabbed over. No seepage. He picked up the mercurochrome. Cotton swab. Dipped it. Applied it. A sharp sting. He held his breath. Spread it evenly. Wrapped it. His movements were slow. Steady. No shaking. He put the rubber boots back on. Tied them tight. His center of gravity sank. He tested three steps. The rubber soles bit into the terrazzo floor. The anti-slip worked.

Breakfast. Dining hall. Few people. He waited until last. Avoided the crowd. Went to a long bench. Opened the oiled-paper packet. Cold steamed bun. Broke it apart. Swallowed it with warm water from the thermos cup. Something settled in his stomach. Not bloated. He finished eating. Tidied up. Left no trace. Returned to the dormitory. Spread open the ledger. The pencil moved. Funds. 1.11 yuan. Hot-water bottle. Ready. Rubber boots. Reinforced. Motion-sickness pills. Six left. Today. Depart at 13:00. Check results at 14:00. Interview at 14:30. He calculated the time window. Tight. No redundancy. Fault tolerance. Zero. He wrote it down. Interview. Do not rush to answer. Do not leave blanks. Break it down by framework. Keep the handwriting neat. No crossing out.

The pencil point paused. He closed the ledger. His fingers tightened. The edge of the paper curled. He tucked it into the bottom of the bag. Pressed it down. Footsteps came from the corridor. The night-duty teacher. The beam of a flashlight swept past the crack under the door. Stopped. “Don’t run today. The road is slippery. Wait for notice.” The voice was low. “Understood,” Lin Chen answered. His hands rested on his knees. He moved them slowly. The pain in the soles dulled. His body felt hollowed out. But he did not sleep. Outside the window, the clouds broke apart. Gray-white daylight showed through. The wind threaded through the cracks. Let out a low whistle.

13:00. Lin Chen slung the bag over his back. Pushed the door open. Went out. The corridor was cold. Wind poured up from the stairwell. It carried the smell of chalk dust and old wood. He went downstairs. His steps were steady. The rubber soles landed on the icy stairs. His center of gravity tilted forward. Stride length thirty centimeters. He did not step on the edges. The anti-slip tread bit into the ice. Made a fine crunching sound. Effective.

13:40. No. 3 City Middle School. Old front gate. Rust mottled the iron. The gatehouse was lit. Frost crusted the glass window. Lin Chen showed his admission slip. The gatekeeper checked it. Stamped it. Let him through. He walked into the campus. Concrete path. Snow half melted. Footprints in disorder. He walked along the main path. Avoided the crowd. Old teaching building. Three stories. Red brick. Plaster peeling. He stopped in front of the notice board. Wooden frame. Glass cover. White paper posted inside. Black print. Not up yet. He stepped back two paces. Stood in the lee of the wind. Hands in his pockets. His thumbs rubbed the calluses on his fingertips. No anxiety. No impatience. He waited.

14:00. The bell. Short. Shrill. A teacher from academic affairs pushed the door open. Paste brush in hand. White paper. Black print. Posted it inside the glass case. The crowd surged. Footsteps. Scuffing. Low voices. Lin Chen did not squeeze in. He stood on the outer edge. His eyes swept over it. The names were ordered by stroke count of the surname. He searched. Third column. Line forty-seven. Lin Chen. Written test. Passed. Interview. Room 302. Time. 14:30. He stared at that line. Three seconds. No smile. No sigh. His shoulders sank half a centimeter. His breathing stayed even. White vapor left his mouth. He stepped forward. Copied down the information. Admission-slip number. Seat number. Exam room number. The handwriting was neat. Pressure even. No shaking. Finished copying. Stepped back. Turned. Left.

14:15. Laboratory building. Third floor. The corridor was cold. Wind poured in through a broken window. Carried the smell of disinfectant. He found Room 302. Paint faded on the doorplate. An empty bench outside the door. He sat down. The canvas bag rested by his leg. He opened the zipper. Took out a blank notebook. Opened it. The pencil moved. Phenomenon. Variables. Model. Error. Conclusion. Five lines. Drawn straight across the page. No crossing. No tangling. He closed his eyes. Rehearsed. If the examiners ask about a shortage of funds, answer: replace materials. Cut non-core parts. Use scrap. If they ask about team disagreement, answer: align on the goal. Divide work by strengths. Keep records. If they ask about contingency plans after failure, answer: return to school. Shore up weak points. Wait for the next chance. Do not interrupt. Do not argue. Only give the path.

14:28. The door opened. The proctor stuck his head out. “Lin Chen.” Lin Chen stood up. Put away the pencil. Closed the notebook. Pulled the zipper shut. The canvas bag lay flat against his back. He walked to the door. Nodded. “Here.” The teacher stepped aside. Let him in.

The room. Three desks. Pushed together into a U shape. Three examiners. In the middle. Mathematics. Glasses. Light flashed on the lenses. On the left. Physics. Gray jacket. Frayed cuffs. On the right. General assessment. Middle-aged. Thermos cup. Steam rising from it. A wall clock hung behind them. The second hand moved. Tick. Tick. Lin Chen walked to the assigned chair. Sat down. Back straight. Hands on his knees. Eyes level. No dodging. No drifting.

The math examiner spoke first. Voice even. “Bonus question. Anti-slip plan. Budget cut in half. Can’t afford coarse sand. How do you make it work?”

Lin Chen. Three seconds. Not flustered. “Replace the material. Furnace slag. Coal gangue. Mining waste. Low cost. Rough particles. Friction coefficient can meet the standard. Need to collect it in advance. Dry it. Increase the laying thickness by two centimeters. Compensate for the lower density. Transport cycle extends by half a day. But the safety margin remains.”

The physics examiner took over. Spoke fast. “Pouring water on the brake drum to cool it. Thermal expansion and contraction. Metal fatigue. Long-term risk. Your plan doesn’t mention that.”

Lin Chen. “A temporary measure. Not a long-term plan. Need to add guide channels. Control the amount of water. Avoid sudden localized cooling. Perform regular flaw detection. Replace brake pads. Shift the cost into the transport cycle. Single-trip wear is lower than the loss from an accident. The model boundary is already marked. In an extreme snowstorm, the plan fails. Then anti-slip chains are required. Or service must stop.”

The general examiner set down the thermos cup. His gaze was heavy. “You’re from Qingshi Village. Resources are limited. If you don’t pass the interview today, what next?”

Lin Chen. Breathing steady. “Go back to school. Strengthen weak points. Wait for the next winter camp. Or apply to audit classes at County No. 1 Middle School. Record the mistakes. Adjust strategy. No interruption. No complaint. Execute.”

Silence. Three seconds. Pen on paper. A dry rustle. The general examiner nodded. “Wait outside.”

Lin Chen stood up. Bowed. Turned. Went out. Closed the door. Lightly. No sound. He leaned against the wall. Back against cold brick. His breathing stayed even. His fingers were a little cold. But they did not shake. He looked at his watch. 14:52. Twenty-two minutes. Within the limit. No stumbles. No crossing out. Logic closed into a loop. He went down the stairs. Steps steady. Rubber soles on the stair treads. Center of gravity forward. He did not step on the edges. The anti-slip worked.

Courtyard. Sunlight slanting in. Shadows stretched long. The wind was hard. He walked to the bench. Sat down. Spread open the ledger. Blank page. The pencil moved.

Day 29. 15:00. Interview finished. Progress: three questions, three answers. Logical loop closed. No crossing out. No pauses. Status: execution complete. Gap: result not yet out. Must wait for final-selection notice. New variable: the examiners care about cost substitution and long-term risk. Not pure theory. Emphasis on engineering thinking. Countermeasure: build a substitute-materials file. Record parameters of by-products from mines/factories. Keep as backup.

The pencil point paused. He closed the ledger. His fingers tightened. The edge of the paper curled. He tucked it into the bottom of the bag. Pressed it down. He stood up. Slung the bag over his back. Pulled the zipper shut. The canvas bag lay flat against his back. His steps were steady. Stride length thirty centimeters. He did not step on the edges. The anti-slip tread bit into the ice. Made a fine crunching sound. Effective.

He walked out of the school gate. The iron gate stood half open. The gatehouse was lit. A new notice was posted on the glass window. White paper. Black print. “The final-selection list will be announced Friday at 10:00. Those selected must pay a fifty-yuan training deposit. Bring your own textbooks. Those not selected return on their own. The deposit is refundable.”

Lin Chen stared at that line. Three seconds. Not flustered. Fifty yuan. He had 1.11 in his account. Shortfall: 48.89. He did not need a miracle. He only needed a path. He withdrew his gaze. Turned. Kept walking. Along the national road. Avoided the crowd. Steps steady. Stride length thirty centimeters. Did not step on the edges.

The wind threaded through the gaps. Let out a low whistle. The ridge line in the distance was clear. The cloud cover was thin. Sunlight shone on the snowfield. Reflected a cold light. He closed his eyes. There were no formulas in his head. No vocabulary words. Only three lines. One was the estimation rule. If centered, estimate five. If shifted right, estimate seven. One was the frozen road surface. Rubber tread. Center of gravity forward. Do not step on the edges. One was the interview framework. Phenomenon. Variables. Model. Error. Conclusion. Three lines. Crossing in the dark. Not colliding. Not tangling. Each moving forward.

He opened his eyes. His gaze settled toward the entrance of the town ahead. The old locust tree. The national road. Black ice. He did not need to guess the result. He only needed to prepare the next step. He took out the blister pack of motion-sickness pills from the inner pocket close to his body. The edge was sharp. Pressed into his palm. He took it out. Set it in his hand. White tablets. Six of them. Enough for two trips. He closed his eyes. Breathing steady. His fingers unconsciously rubbed the zipper pull of the canvas bag. The metal was ice-cold. Rough. Like a stone that had not yet been polished.

When he reached the old locust tree, the wind stopped. The snow grains became finer. They struck his face. Slightly cool. He stopped. His gaze swept over the trunk. The bark was rough. The fissures deep. At the base of the roots sat a kraft-paper envelope. The edges had yellowed. The postmark was blurred. The handwriting was familiar. Mother. Wang Guiying. He bent down. Picked it up. The paper was thin. Light. Something was inside. Not heavy. He pinched it. The edges were hard. Like a medicine box. Or folded receipts. He did not open it. Slid it into the inner pocket close to his chest. Heat transferred through. The paper grew slightly warm.

He turned. Kept walking. Stride length thirty centimeters. Did not step on the edges. The anti-slip tread bit into the ice. Made a fine crunching sound. Effective.

The wind tightened. The mountain shadows in the distance darkened. The clouds pressed lower. Snow was coming again. He did not need to ask what was written in the letter. He only needed to know this: home was still waiting. Medical bills. Tuition. Winter clothes. Three lines. Crossing in the dark. Not colliding. Not tangling. Each moving forward.

He closed his eyes. Breathing steady. His fingers unconsciously rubbed the zipper pull of the canvas bag. The metal was ice-cold. Rough. Like a stone that had not yet been polished.

Friday. 10:00. Final selection.

He turned over, facing forward. His breathing gradually slowed. The wind outside the window stopped. The snow grains became finer. They tapped against the glass with tiny pattering sounds. Everything was smoothed flat. Nothing left but white. And cold.