This photo, published on Wednesday, February 20, 2008, shows Hong Kong singer and actress Gigi Leung (L) and Sammi Cheung at a Hong Kong airport, waiting to set off on their charity journey to Laos. [Photo: Tungstar/xinhuanet.com]

Hong Kong singer and actress Gigi Leung and Sammi Cheung embarked on a charity trip to Laos on Tuesday, on a mission to draw attention to the nation's malnourished children through a 30-hour outdoor experience.

The Hong Kong-based publication Tungstar reports that the pair will live a primitive life during the campaign, camping in the fields and eating wild game for food.

"I have brought everything that may help me, including a pillow and a nightgown," Leung said nervously of the potential survival challenges.

As part of the 30-Hour Famine campaign launched by the international organization World Vision aimed at fighting hunger, the trip is expected to draw more celebrities eager to use their star power to enact change.

Leung and Cheung are two of the project's three ambassadors in Hong Kong.