The federal Liberal party is using all their star power to sway voters in one of the Lower Mainland's most heated ridings.

Justin Trudeau was the latest high-profile Grit - following Bob Rae and Paul Martin - to drum up support for incumbent Richmond MP Raymond Chan, yesterday.

Chan is in for a battle against Conservative candidate Alice Wong, but Trudeau believes Stephen Harper's poor relations with China will ultimately decide the riding's future.

"[The Chinese-Canadian] relationship is at an all-time low," Trudeau, visiting a city with a large Chinese population, told media. "Now we're at the point where the countries are barely talking to each other."

Trudeau, the son of former PM Pierre Trudeau, stressed ties with China are even more important now, with the U.S. economy going south.

Matt Kieltyka reports for Vancouver's 24 hours.