Online retailer Amazon.com Inc. said on Tuesday it had bought out Joyo.com after it raised its investment in the company, one of China's leading online shopping platforms.

"China is our fastest growing geography, and not by a little," said Jeff Bezos, founder and chief executive of Amazon.com.

"We are increasing the investment in Joyo," he said.

Amazon now held 100 percent of Joyo he said, without giving details of the size of the investment.

"When you like the odds, you increase the investment," he said.