ONE   UNFETTERED May 16, 1979 Under a sliver of moon, on an island off the coast of China, a twenty-six-year-old army captain slipped away from his post and headed for the water's edge. He moved as calmly as possible, over the pine scrub to a ledge overlooking the shore. If his plan were discovered, he would be disgraced and executed. Capt. Lin Zhengyi was a model soldier, one of the most celebrated young officers in the army of Taiwan, the island province ruled by opponents of the Chinese Communist Party. For three decades Taiwan had defied Communist control, and Captain Lin was a symbol of that resistance: in college, he had been a star student who'd given up a placid civilian life to join the military, a decision so rare that Taiwan's future president made a point to shake his hand, and the picture was splashed all over the newspapers, turning Lin into a poster boy for the "Holy Counterattack," the dream of retaking mainland China. Lin Zhengyi (pronounced "Jung-yee") stood nearly six feet tall, with ramrod posture, a broad, flat nose, and jug ears that protruded from the rim of his hat. His devotion had earned him the assignment to the most sensitive place on the front line: the tiny island of Quemoy, known in Mandarin as Jinmen, barely one mile, across the water, from the rocky coast of mainland China.

But Captain Lin had a secret so dangerous to him and his family that he did not dare reveal it even to his wife, who was home with their son and pregnant with their second child. Captain Lin had awoken to a sense of history gathering around him. After thirty years of turmoil, China was appealing to the people of Taiwan to reunify the "great Motherland." Any soldier who tried to defect to the mainland would be shot on sight. The few who tried were exceedingly rare, though the consequences were vivid; the most recent case had occurred less than a month ago. But Lin had heard his calling. China would prosper again, he believed. And he would prosper with it.

In the darkness he found the sandy path that could lead him safely down a hill laden with land mines. The wind off the sea had bent the gnarled island pines. The water, a brilliant crystal green by day, was now an endless black mass, surging and withdrawing with the waves. To ward off an invasion, the beaches had been fitted with long metal spears that protruded from the sand to face the sea. Just before the captain left the tree line for the dash to shore, he loosened the laces of his shoes and stepped barefoot onto the soil and stone. He was ready to abandon his fellow soldiers, his family, and his name. *   *   * Virtually everyone else who had tried to swim those waters had headed in the opposite direction. In 1979, mainland China was a place to flee.

In the eighteenth century, imperial China controlled one-third of the world's wealth; its most advanced cities were as prosperous and commercialized as Great Britain and the Netherlands. But in the nineteenth and twentieth centuries, China was crippled by invasion, civil war, and political upheaval. After taking power in 1949, the Communist Party conducted a "land reform" campaign that grouped China's small family farms into collectives, and led to the killing of millions of landlords and perceived enemies. In 1958, Chairman Mao launched the Great Leap Forward, attempting to vault his country past Britain in just fifteen years. Some advisers told him it was impossible, but he ignored and humiliated them; the head of the national technology commission jumped out a window. The propagandists hailed one fantastical harvest after another, calling them "Sputnik harvests," on par with the success of the Soviet satellite. But the numbers were fiction, and as starvation spread, many who complained were tortured or killed. The Party barred people from traveling to find food.

Mao's Great Leap Forward resulted in the world's worst famine, which killed between thirty and forty-five million people, more than World War I. By the time Captain Lin defected from Taiwan, the People's Republic was poorer than North Korea; its per capita income was one-third that of sub-Saharan Africa. Deng Xiaoping had been China's paramount leader for less than six months. At seventy-five, he was a persuasive but plainspoken statesman, and a survivor-repeatedly purged from the leadership by Chairman Mao, twice rehabilitated. In the years since, he has often been described as the sole architect of the boom that followed, but that view is the handiwork of Party historians. Deng understood the limitations of his knowledge. On matters of the economy, his shrewdest move was to unite with Chen Yun, a fellow Party patriarch who was so skeptical of the West that he greeted the idea of reform by rereading Lenin's Imperialism ; and with Zhao Ziyang, a younger, progressive Party boss whose efforts to reduce poverty had spawned a saying among peasants: "If you want to eat, look for Ziyang." When change came, it came from below.

The previous winter, in the inland village of Xiaogang, the local farmers had been so impoverished by Mao's economic vision that they had stopped tilling their communal land and had resorted to begging. In desperation, eighteen farmers divided up the land and began to farm it separately; they set their own schedules, and whatever they sold beyond the quota required by the state, they sold at the market and reaped the profits. They signed a secret pact to protect one another's families in the event of arrest. By the following year, they were earning nearly twenty times as much income as before. When the experiment was discovered, some apparatchiks accused them of "digging up the cornerstone of socialism," but wiser leaders allowed their scheme to continue, and eventually expanded it to eight hundred million farmers around the country. The return of "household" farming, as it was known, spread so fast that a farmer compared it to a germ in a henhouse. "When one family's chicken catches the disease, the whole village catches it. When one village has it, the whole county will be infected.

" Deng and the other leaders squabbled constantly, but the combination of Deng's charisma, Chen's hesitation to move too fast, and Zhao's competence was startlingly successful. The model they created endured for decades: a "birdcage economy," as Chen Yun called it, airy enough to let the market thrive but not so free as to let it escape. As young revolutionaries, the elders had overseen the execution of landlords, the seizure of factories, and the creation of people's communes. But now they preserved their power by turning the revolution upside down: permitting private enterprise and opening a window to the outside world even if it allowed, as Deng put it, "a few flies" to get in. China's reforms had no blueprint. The strategy, as Chen Yun put it, was to move without losing control-to "cross the river by feeling for the stones." (Deng, inevitably, received credit for the expression.) In 1979 the Party announced that it would no longer tag people as "landlords" and "rich peasants," and later Deng Xiaoping removed the final stigma: "Let some people get rich first," he said, "and gradually all the people should get rich together.

" The Party extended the economic experiment. Officially, private businesses were permitted to hire no more than eight employees-Marx had believed that firms with more than eight workers were exploitative-but eventually small enterprises began popping up so fast that Deng Xiaoping told a Yugoslav delegation that it was "as if a strange army had appeared suddenly from nowhere." He did not take credit. "This is not the achievement of our central government," he said. All over the country, people were exiting the collective farms that had dominated their lives. When they talked about it, they said they had been songbang- "unfettered"-a term more often used for a liberated prisoner or an animal. They began to talk of politics and democracy. But Deng Xiaoping had his limits.

In March 1979, not long before Lin Zhengyi embarked on his adventure to the mainland, Deng spoke to a group of senior officials and demanded, "Can we tolerate this kind of freedom of speech which flagrantly contravenes the principles of our constitution?" The Party would never embrace "individualist democracy." It would have economic freedom but political control. For China to thrive, there must be limits on "emancipating the mind." *   *   * When change began to take hold on the mainland, Lin Zhengyi watched it from afar. He was born in 1952, three years after Taiwan and the mainland had embarked on the ideological and political standoff that would endure for decades. After losing China's civil war to the Communists in 1949, the Nationalist Party fled to the island of Taiwan, where it declared martial law over the islands and prepared, in theory, for the day that it might return to power over China. Life in Taiwan was harsh and circumscribed. Lin grew up in the lush river delta town of Yilan, in a remote corner of Taiwan's main island.

His family was descended from earlier migrants from the mainland. The arriving Nationalist forces viewed the earlier migrants as low-class and politically unreliable, and they were subject to widespread discrimination in jobs and education. His father, Lin Huoshu, ran.