BEIJING -- China has studied U.S. and European Union laws in drafting its own counterterrorism bill which requires tech firms to assist security authorities to prevent and investigate terrorism, an legislative official said here Sunday.

At a press conference held at the end of a week-long session of the top legislature, Li Shouwei of the National People's Congress (NPC) Standing Committee legislative affairs commission, admitted that a number of countries and enterprises had voiced concerns about certain provisions in the law.

He pointed to Article 18 of the new law, which requires telecom operators and internet service providers to provide technical support and assistance, including decryption, to police and national security authorities in prevention and investigation of terrorist activities.

Li said the rule accorded with the actual work need of fighting terrorism and was basically the same as what other major countries in the world do.

"The clause reflects lessons China has learnt from other countries and is a result of wide solicitation of public opinion," he added.

"(It) will not affect companies' normal business nor install backdoors to infringe intellectual property rights, or ... citizens freedom of speech on the internet and their religious freedom," Li said.