SEOUL, May 31 (Xinhua) -- The Trilateral Cooperation Secretariat (TCS) is a Seoul-based international body for promoting peace and common prosperity among China, Japan and South Korea.

To commemorate the 13th anniversary of the signing of an agreement on its establishment, various activities including calligraphy performance as well as song and dance shows were held in Seoul, capital of South Korea, by the TCS.

The event also announced Chinese, Japanese, Korean, and English names of the crested ibis which serves as the mascot of the secretariat.