Chinese Premier Wen Jiabao's just concluded trip to Japan, during which he attended the fourth China-Japan-South Korea summit, has significantly boosted tripartite cooperation and regional peace and stability, Chinese Foreign Minister Yang Jiechi said Sunday.

Yang said the trip was practical, effective, productive and a complete success.

Deepening trilateral cooperation

The trip has deepened trilateral practical cooperation in various fields, Yang said.

Wen, at the trilateral summit held in Tokyo on Sunday and attended by Japanese Prime Minister Naoto Kan and South Korean President Lee Myung-bak, put forward a seven-point proposal for the three countries to widen cooperation.

First, efforts should be made to support Japan's post-quake reconstruction.

Second, the three countries should attach great importance to nuclear safety and strictly implement the consensus reached.

Third, the three countries should promote practical cooperation on disaster prevention and reduction.

Fourth, they should promote liberalization and facilitation of trade and investment among them, push forward integration of regional economy, and try to start negotiations on a tripartite free trade zone next year.

Fifth, they should vigorously develop renewable energy and popularize energy-saving technology.

Sixth, they should speed up construction of demonstration bases for circular economy in order to promote rational use of resources, protect the environment and realize sustainable development.

Seventh, they should boost people-to-people and cultural exchanges.

Premier Wen's proposal was applauded by Japanese Prime Minister Kan and South Korean President Lee.

The three leaders, in a joint declaration issued after the summit, said they would deepen the future-oriented comprehensive cooperative partnership among the three countries.

They also agreed to cooperate on disaster management, nuclear safety, economic growth, sustainable development and cultural affairs.