In hiring noted architects from around the world, Zhang has pushed the boundaries of design in Beijing. Kengo Kuma of Japan, who designed the Osaka headquarters of LVMH Moet Hennessy Louis Vuitton SA, created Sanlitun Soho, a development of nine office and apartment buildings shaped like ocean waves. It opened in June。

　　“She is a natural experimentalist, simultaneously setting and defying trends,” Pan says。

　　Zhang and Pan develop buildings for Chinese much like themselves: entrepreneurs. Many of their rivals put up conventional offices, to be leased mainly to multinational tenants, or grandiose villas and luxury apartments with swimming pools for China’s superrich. The duo conveyed their more practical side with the name Soho, which stands for small office, home office。

　　The company says it has developed 2.3 million square meters (24.8 million square feet) of real estate -- including about a fifth of Beijing’s central business district. Soho China’s early projects were multiuse, designed for living, working or both. Buyers of Zhang’s high-end units, which can cost more than 60,000 yuan ($8,860) a square meter, include coal mine owners and exporters. In the second quarter, 92 percent of Soho China’s buildings were occupied, Zhang says. Profit surged last year more than eightfold to 3.3 billion yuan。

　　Zhang Expands

　　“They focus on sectors which hold long-term promise,” says Mark Mobius, Singapore-based executive chairman of Templeton Asset Management Ltd., which is Soho China’s largest institutional investor, with a 4 percent stake, according to data compiled by Bloomberg. “They have high sensitivity and a great sense of style。”

　　Zhang is now expanding her empire again, dismissing the China bears. In June, she paid 2.25 billion yuan for a 22,500- square-meter plot of vacant land on the Bund, Shanghai’s stately colonial-era waterfront strip, where buildings resemble those of 19th-century Europe. Two weeks later in Beijing, she started marketing a futuristic 485,000-square-meter commercial, retail and entertainment complex that’s shaped like interlinked cocoons. It will be designed by London-based Pritzker Prize- winning architect Zaha Hadid。

　　Agricultural Bank

　　Many investors don’t share Zhang’s optimism about the housing market. On July 16, the Agricultural Bank of China debuted on the Hong Kong stock exchange, rising 2.2 percent to 3.20 Hong Kong dollars. Analysts and fund managers surveyed by Bloomberg had predicted a first-day gain of 5 percent, according to the average of seven estimates. On Aug.3, the stock closed at 3.51 Hong Kong dollars, a rise of 9.7 percent。

　　Agricultural Bank made 1 trillion yuan of mortgage and other loans last year, and its rate of nonperforming credits at the end of 2009 was 2.91 percent -- almost double that of China’s three other largest state-run banks。

　　As housing prices fall, bad loans will surge and hurt the state-owned banks, says Michael Pettis, a professor of finance at Peking University. “I would stay clear of property developers and banks,” says Marc Faber, who oversees $300 million at his own firm and has managed money in Hong Kong for the past 37 years。

　　Cambridge University

　　“My life then was exactly the same as those factory workers,” Zhang says. “It was mindless work. You basically moved from one factory to another for whoever paid you slightly more。”

　　By age 19, she had saved the equivalent of a few thousand British pounds -- enough to buy an airplane ticket to London and support herself while she studied English at secretarial school。

　　“Quickly, after I landed in England, I found out ways to get scholarships,” she says. “England turned out to be a very encouraging place for me。”

　　She won a spot at the University of Sussex, where she earned her undergraduate degree in economics in 1991. Then she enrolled at Cambridge and graduated in 1992 with a master’s in development economics。

　　Goldman Sachs

　　Barings Plc, a London-based investment bank, hired Zhang right out of Cambridge to work in Hong Kong analyzing privatization in China. Soon after starting the job, she switched to Goldman Sachs, serving as an analyst at the investment bank. It was a short stay. In 1994, she joined Travelers Group Inc. Homesick, she returned to China a year later。

　　Zhang told the New Yorker magazine in 2005 that she had detested investment banking。

　　“On Wall Street, all values seemed upside down,” she said. “People spoke crassly, treated each other badly, looked down on the poor and adored the rich。” She said investment banking reminded her of her days working in the Hong Kong garment factories. “The difference is, in Hong Kong the competition turned people into shortsighted mice, whereas on Wall Street it turns them into wolves and tigers,” she said。