China sought on Friday (Jan. 15) to play down a threat by Google Inc to quit the country on hacking and censorship concerns, saying any decision by the Internet search giant would not affect U.S. trade ties.

The United States said it was too soon to tell how economic ties would be affected, but added free information flow was crucial to China's maturing economy.

A spokesman for China's Commerce Ministry said there were many ways to resolve the Google issue, but repeated that all foreign companies, Google included, must abide by Chinese laws.

"Any decision made by Google will not affect Sino-U.S. trade and economic relations, as the two sides have many ways to communicate and negotiate with each other," spokesman Yao Jian told a regular news briefing in Beijing.

"We are confident about developing healthy trade and economic ties with the United States."

The issue risks becoming another irritant in China's relationship with the United States, already strained by arguments over the Chinese currency's exchange rate, trade protectionism and U.S. arms sales to Taiwan.

The United States has backed Google's decision to no longer support China's censoring of Internet searches, and has raised the issue at a diplomatic level.

"It seems to me that the principles that Google is trying to uphold are not just important in a moral or rights framework, but are also of very considerable economic importance," senior White House economic adviser Lawrence Summers said.

"I think it's too early to assess what all of the effects will be," he added when asked if the dispute would mark a turning point in the U.S. economic relationship with China.

Washington has long been worried about Beijing's cyber-spying program. A congressional advisory panel said in November that the Chinese government appeared increasingly to be penetrating U.S. computers to gather useful data for its military.

Playing down the concerns raised by Google, rival Microsoft Corp said it had no plan to pull out of China.

"I don't understand how that helps anything. I don't understand how that helps us, and I don't understand how that helps China," said Steve Ballmer, CEO of the world's largest software maker.

Microsoft has high hopes for its Bing Internet search engine in China, which has only a small share of the market but could benefit if Google, the No. 2 player behind dominating local rival Baidu Inc, pulls out.

China's population of Web users grew to 384 million by the end of 2009, a jump of nearly one-third in one year, an official report showed on Friday, underscoring the growing scope and business allure of the country's Internet.

U.S. Deputy Assistant Secretary for East Asian and Pacific Affairs David Shear met a Chinese diplomat in Washington on Thursday to seek an explanation about the cyber-attacks and censorship.

"The incident raises questions about both Internet freedom and the security of the Internet in China," State Department spokesman P.J. Crowley said.

"We have serious concerns about this and its ramifications, and we're going to continue our dialogue with China on these and other kinds of issues," he said.

A U.S. official said Shear received no reply from China.

China has defended its censorship, and Chinese media are stressing that foreigners must abide by Chinese laws.

Most of the filters on were still in place on Friday, though controls over some searches, including the June 4, 1989 Tiananmen crackdown, appear to have been loosened.

Google said on Tuesday that in mid-December it detected an attack on its corporate infrastructure originating from China that resulted in the theft of its intellectual property. It said that more than 20 other companies had been infiltrated, although cyber experts say 34 firms were attacked.