Two Chinese companies debuted on the NYSE today to much fanfare. E-Commerce

Two Chinese companies debuted on the NYSE today to much fanfare.

E-Commerce China Dangdang Inc. and Youku.com Inc. soared in their much-anticipated U.S. market debut today.

Youku.com Inc. surged in the biggest gain for a U.S. initial public offering in five years and E-Commerce China Dangdang Inc. almost doubled in its debut, the latest sign of booming demand for Chinese Internet companies.

Three smaller companies are scheduled to debut on U.S. stock exchanges this week, including a $94 million offering from Bona Film Group Ltd., a Chinese studio known for its martial arts movies; Taiwanese company SemiLEDs Corp., a maker of chips used in LED displays, which hopes to raise about $81 million; and mobile-application seller Sky-mobi Ltd., which hopes to raise $65 million.

China, home to more than 400 million Internet users, may expand four times as fast as the U.S. next year, according to the International Monetary Fund.

In general, analysts say that the most successful Chinese IPOs are the ones selling to China’s growing middle class, a group earning higher incomes and with more Internet access and free time. And since the U.S. economy is not growing very fast, U.S. investors looking for growth are drawn to emerging markets like China.

Check the fundamentals of these businesses before you decide to invest. Make sure it’s a solid company and not just the hype.

We still like Baidu!