The Riyuexing Cup (日月星杯, Rìyuèxīng Bēi) was a China-Korea event held in 2005.
It was sponsored by Celestial NutriFoods.
Each country fielded a five player team. Each team member would play against every player of the opposing team. This would entail five rounds of five games each, a total of 25 games.
However, the fifth and final round was postponed and eventually abandoned, with China leading 11-9.
As a China-Korea match it was similar to the later Zhaoshang Cup (2011-14), although the format was different.
The Wikipedia page uses a match-by-match rundown, so let's use a player-by-player one for some variety.
Zhou Heyang beat Yoo Changhyuk, Song Taekon and Park Yeonghun, and lost to Kim Seongryong.
Wang Lei beat Song Taekon and Park Yeonghun, and lost to Choi Cheolhan and Yoo Changhyuk.
The extremes of both success and failure were with the Koreans: Choi won all his games and Song lost all of his.