China wants everyone to chill out about its worrying new cybersecurity law

China has a message for those who are worried by the nation's new cybersecurity rules: Chill out, guys.

Its pending cybersecurity law will not create obstacles for foreign business, China's Foreign Ministry has claimed, responding to concerns by international business lobbies over the planned rules.

Last week, More than 40 global business groups petitioned Premier Li Keqiang, according to a copy of a letter seen by Reuters, urging China to revise draft cyber rules they argue are vague and discriminate against foreign enterprises.

The groups say the pending rules, including a cyber security law that could be passed this year, include provisions for invasive government security reviews and onerous requirements to keep data in China.

They say the regulations would impede China's economic growth, create barriers to market entry and impair the country's security by isolating it technologically.

The ministry, in a faxed statement to Reuters late on Tuesday night, said the law will not be used to "carry out differential treatment and will not create obstacles and barriers for international trade and foreign businesses investing in China."

It said companies would be able to transfer data required for business purposes outside China's borders after passing a security evaluation.

"These evaluations are for supervising and guaranteeing that the security of this data accords with China's security standards," the ministry said.

"As for the legal requirement for internet operators to provide relevant data in the course of enforcement agencies' counter-terrorism and criminal investigations, this is necessary for safeguarding national security and investigating crimes. All countries do this," it said.

China thinks businesses' concerns are "unnecessary" - but they might not agree

"The concerns of foreign investors and businesses invested in China are unnecessary," the ministry claims.

But some foreign businesses in China are becoming increasingly pessimistic, in part due to rules companies think could make it harder to operate there.

The cyber rules have added to tensions between China and its trade partners, who have been concerned about Beijing's Made in China 2025 plan. The proposal calls for a progressive increase in domestic components in sectors such as advanced information technology and robotics.

Business lobbies also say requirements to hand over sensitive data or source code to the government could put business secrets at risk, and boost the capabilities of domestic competitors.

China has long had a distinct internet ecosystem from much of the rest of the world - in part because of its strict rules and filtering. "The great firewall of China" is infamous - an extensive program of internet censorship and filtering.

Google no longer operates in mainland China, because it was unwilling to censor search results like the government demanded. And some of China's biggest apps, like WeChat, have little audience outside of the country - because of its reliance on other Chinese apps and and services.

How much technology firms should cooperate with governments has been a contentious issue in many countries, not just in China.

Apple was asked by Chinese authorities within the past two years to hand over its source code but refused, the company's top lawyer said this year, even as U.S. law enforcement tried to get the company to unlock encrypted data from an iPhone linked to a mass shooting.

(Reporting by Michael Martina; Editing by Richard Borsuk)