BEIJING -- The establishment of the East China Sea Air Defense Identification Zone is a strategic decision in accordance with China's current national security situation, experts told Xinhua on Sunday.

"Setting up the air defense identification zone can effectively safeguard national sovereignty and security," said Zhang Junshe, a military expert, adding that the move conforms to the fundamental spirit and principle of international law.

The Chinese government issued a statement on Saturday morning on establishing the East China Sea Air Defense Identification Zone. It also issued an announcement on the aircraft identification rules and a diagram for the zone.

According to the announcement, China will take timely measures to deal with air threats and unidentified flying objects from the sea, including identification, monitoring, control and disposition.

"The move also accords with common international practices as the United States and Canada took the lead around the world in setting up such zones starting in the 1950s," said Xing Hongbo, a military and legal expert, adding that more than 20 countries have set up air defense identification zones since then.

"Various aircraft with high altitude and high-speed flying capabilities have been broadly used around the world with the development of aviation technology, and it's hard for China to identify an unidentified flying object and adopt countermeasures immediately," said Meng Xiangqing, a military expert.

The establishment of the zone can help set aside early warning time to ascertain an aircraft's purpose and attributes and adopt measures to protect air defense security, Meng said.