Kunming, Yunnan — 1939
I. The Academic Tribunal
"This war has taken everything from us. And it has given us nothing but exile — it dragged us here.
We are far from Peking now, and far from Shanghai. We no longer have roads that reach in every direction, or nights of song and dancing. We do not even have a classroom that keeps out the rain.
Look around you. Does this place resemble a campus at all?
We have nothing, your honor.
This is Yunnan."
At the academic tribunal, the "Barista" who had caused the trouble made his defense.
"And it's perfect."
Having said this, he waited calmly for the final verdict.
II. The Wandering Campus
In 1938, the Asian theater of the Second World War produced a university in exile that the world has almost forgotten.
It existed for only eight years. It resembled less a single place called "a school" than a nomadic academic tribe.
To escape the fighting, students and faculty traveled for weeks by sea, by rail, by road — some walking for months — to reach a campus thousands of kilometers away, built from raw brick and thatch. Along the way they surveyed local customs, collected specimens, and held lectures as they went, working around bandits, mountain roads, and weather.
They held class under bombardment, lessons routinely interrupted by air-raid sirens, so that classes were often moved to bomb shelters, open fields, or mountain ravines. Their classroom roofs were sheets of tin; on rainy days the rain hammered so loudly against the metal that teaching became impossible, and everyone simply sat in silence and listened. There was no money to build a library, so books and study desks were scattered instead across the teahouses of Kunming's streets and alleys.
No one knew it at the time, but this "temporary" university — under eight straight years of bombardment and extreme poverty — would go on to produce two future Nobel laureates and more than 170 members of the national academies of science and engineering, among other leading scholars. Its entire body of graduates numbered fewer than four thousand.
Its name was the National Southwestern Associated University — Lianda.
III. A Failed Experiment at the Teahouse
Lee — the boy everyone now called Barista — walked into the teahouse on Wenlin Street.
The legs of the old eight-immortals table were still sunk in last night's rainwater. On its surface, a row of enamel mugs stood arranged like a disciplined squad awaiting orders.
Two weeks earlier, this third-year physics student had been placed on academic probation. He had packed a sack of dried fava beans into an old espresso machine and tried to extract a liquid from them; the pressure had caused it to explode. The university, already straining under conditions it could barely survive, had little patience left for anyone manufacturing new disasters.
"Oh, science," said the philosophy student beside him — Barista's friends called him "the Bard" — putting on a wicked grin and doing his best impression of the famous Polish-French scientist's voice. "Nothing is to be feared. It is only to be understood."
"Let's go. Moment of truth."
The Bard produced several bags of dried, dehydrated crops, pre-measured in advance, and poured them one by one into the enamel mugs on the table.
"Ladies and gentlemen, flavor is an art," Barista said, looking around at the gathering crowd of friends and teahouse patrons, unmistakably pleased with himself. "And balance is the spine of that art."
In 1938, Kunming did not yet grow coffee. To the people who lived there, coffee itself was still a luxury known only in Beiping, Shanghai, and other great cities. So it was that this pack of self-styled clever young men had hit on the idea of assembling a formula from Kunming's own local crops — something to feed into the espresso machine that might imitate, or even surpass, the roasted depth of real coffee. A mock-espresso.
His first attempt had failed completely, and had very nearly destroyed the plumbing in the school kitchen. Barista was not his real name — it was the nickname a few troublemakers had hung on Lee the moment his disciplinary notice went up, and it had stuck.
Word soon spread among the students that Barista was moving his second experiment to the teahouse, in secret. It did not stay secret for long.
By quarter past three that afternoon, the teahouse was packed.
"Coffee is nothing but a transient high-pressure, high-temperature fluid seeping through a porous medium," Barista said, eyes fixed on the pressure gauge. "The bean is just the medium. It isn't a requirement."
"If steam can pass through ground coffee," he went on, "then it should be able to pass through any plant matter at all."
At this, three more physics students immediately started heckling him, urging the great scientist to cut the lecture and get on with it. They wanted to see what happened next.
"Trust me," Barista said, brandishing the tamper, "get the ratio of carbohydrate to cellulose right, and I can replicate the extraction with crops alone."
Laid out with great care across the mugs on the table was the latest formula:
Thirty-five grams of dried fava beans. Twelve grams of dehydrated corn. Eight grams of smoked dried chili. A pinch of roasted barley. And a touch of sugar beet.
Barista ground the mixture down to a particle size of roughly three hundred microns.
"Porosity, point-four-one," he said, lifting the ominous-looking yellow powder and turning it over in his hands like a treasure. "If my math is right, we should see liquid in twenty seconds."
He lit the burner, brought the boiler up to heat, and tipped the ground mixture into the portafilter basket. Barista took a deep breath and locked the portafilter into the group head. Three, two, one — twisted hard to the right, as far as it would go.
With a deafening roar, the pump began forcing water into the group head.
"Pressure's climbing!" someone shouted.
One bar. One and a half. Two bars.
Every eye in the room fixed on the spout. Nothing came out.
"Strange," muttered one of the hecklers, frowning. "Grind too coarse?"
Barista shook his head. "No."
This was not his first attempt. By his own calculations, the porosity of his precious mixture was now nearly identical to ordinary ground coffee. If the math held, it should let hot water pass through evenly, the way it does through coffee — not seal itself into an impermeable brick of plant matter.
But the sound was wrong. Under normal conditions, hot water forcing its way through coffee grounds makes a soft, even hiss. What he heard instead was the boiler settling into a duller and duller groan, as if something inside the machine were slowly swelling.
The gelatinizing corn and fava beans had fused together and expanded rapidly, forming a plug with gaps far smaller than anything in ordinary coffee grounds.
At the fifteen-second mark, the first drop of liquid finally appeared: a thick, nearly green sludge, clinging to the double spout, refusing to fall.
Then it was sucked back in.
No one spoke. The silence in the room turned frightening.
The boiler kept building pressure. The safety valve began hissing white steam in broken bursts.
Hsssss—
Hsssss—
Barista's face went white.
"RUN!" he shouted.
The blast came like a bomb going off. The entire espresso machine erupted, hurling a scalding, feral geyser of fava paste, corn slurry, chili oil, and green vapor straight through the puck and into the room. The brass boiler let out one long, tortured shriek. Within seconds, the whole teahouse was swallowed in a smell no one there had ever encountered before — scorched, wild, and unmistakably like a roast.
On the table, a sheet of paper titled Mock-Espresso Phase Diagram drifted slowly to the floor.
