GENEVA, June 11 - Olympic champions China beat Cuba in straight sets 25-14, 25-17, 25-18 to win the women's volleyball Swiss Grand Prix on Sunday.This was the Chinese team's first trophy since 2003 in the tournament, which was billed as the women volleyball's "Mini World Cup". It was China's first win over Cuba in the tournament's final.They have met twice previously in 1998 and 1999 and China lost both.