BEIJING, June 25 -- Chinese Vice President Li Yuanchao will address the opening ceremony of the fourth World Peace Forum (WPF) to be at Beijing's Tsinghua University on Saturday.

Chinese Foreign Ministry spokesman Lu Kang told a routine press briefing that the forum will last from Saturday to Sunday, with the theme of "working together, understanding, coordination and mutual help".

Main topics of the forum include security cooperation among world powers, security cooperation in the Asia-Pacific region, European and global security cooperation, ASEANand South Asian regional security cooperation.

Some 500 participants will attend the forum including former foreign leaders and scholars, Lu said.

The WPF, founded in 2012, is China's first high-level non-governmental seminar focusing on international security.