Wu Weian would make his senior international debut under Zhu Guanghu on February 7, 2007 in a friendly against Kazakhstan where China won 2–1 in a preparation game several mouths before the 2007 AFC Asian Cup. Wu Weian did not make it into the squad for the tournament but China had a new manager in Vladimir Petrović who would play him against Myanmar in a 2010 FIFA World Cup qualification game where China won 4-0 and Wu scored his debut goal. Vladimir Petrović would try him out in several further friendlies, however after an uninspired draw against El Salvador, Wu would stop being included in any further squads. A year later Gao Hongbo would be the new Chinese manager and Wu was given another chance within the national team on June 4, 2009 against Saudi Arabia but China lost 4-1 and Wu was not included in any further teams.