BEIJING — China's biggest search engine operator has reported a rare drop in profits as it expands into mobile services.
Baidu Inc. said Thursday profit in the latest quarter fell 4.5 percent to 2.6 billion yuan ($430.8 million). Revenue rose 38.6 percent from a year earlier to 7.6 billion yuan ($1.2 billion) but the company faced higher promotion and other costs and a big tax bill.
China's established search engines such as Baidu that focus on desktop computer-based services face new challenges as Web surfers shift to smartphones and tablets.
"The adoption of our mobile platform gained momentum and mobile monetization improved," said Baidu chairman Robin Li in a statement. "Mobile revenues for the first time accounted for over 10 percent of our total revenues this quarter."
The company said earnings before taxes and interest rose 8.4 percent over a year earlier but net profit was reduced by a jump in the tax rate applied to one of its subsidiaries.
China's population of Internet users grew 10 percent over the past year to 591 million people as of the end of June. The number of users who surf the Web on wireless devices rose at double that rate, climbing 20 percent to 464 million. That growth rate accelerated over the previous year's 18 percent rise in wireless users.
The communist government encourages Internet use for business and education but tries to block access to material deemed subversive or obscene. The rise of Web use has driven the growth of new Chinese industries from online shopping and microblogs to online video.
Growth in mobile use has created openings for new competitors, forcing Baidu and other established companies to roll out new services.