The leaders of South Korea, China and Japan have wrapped up a trilateral summit in Beijing.

President Lee Myung-bak, Chinese Premier Wen Jiabao and Japanese Prime Minister Yukio Hatoyama signed two joint declarations, one marking the tenth anniversary of the trilateral summit and the other on sustainable development to seek balanced economic growth and environmental protection.

The three leaders assessed the progress made in trilateral relations since the first trilateral summit in 1999 and agreed to expand cooperation in the future.

The tenth anniversary joint declaration was referred to as a pact based on mutual respect, equality, openness, transparency and cultural diversity.

On the North Korean nuclear issue, they agreed to continue efforts for denuclearization of the Korean Peninsula through peaceful means, to realize the peace and stability of Northeast Asia, and to build a more peaceful, harmonious, open and prosperous region.

To that end, they will work with other concerned parties for the resumption of the six-party nuclear talks.

The three countries also agreed to create a cyber secretariat on trilateral cooperation and to oppose all forms of trade protectionism.

In addition, they will launch a consultation body for long-term cooperation to expand youth and media exchanges and will cooperate on regional and global agenda, including the reform of United Nations.