President Bush is paying his deepest sympathies to those killed in China's massive earthquake.

The President made an unscheduled visit to the Chinese Embassy in Washington today, where he signed a book of condolences.

China is now struggling to find shelter for many of the five million people whose homes were lost in last week's earthquake.

Residents of the Sichuan capital lined up for tents.

A government warning that there could be a major aftershock has scared people straight out of their houses.

But 60 miles away, where the earthquake hit hardest, news of the possible aftershock didn't make much of a difference.

As we saw in Mianyang, people are already living outside.

There are 20,000 people that have found shelter around this sports stadium and they are the fortunate ones.

They may be homeless and living outside in squalor, but they are clothed and fed here, and alive.

Volunteers from the neighboring provinces are caring for victims.

Among them, a group of psychologists encouraging children to draw, to express their fears.

Four-year-old Zhou Rong Hua's mother says he's been unusually quiet since their house collapsed on them.

"From the painting," says psychologist Tang Xiao Ping,

"I can see this is typical post-traumatic stress disorder."

But Ping expects most kids will bounce back quickly.

Most of the children's drawings are full of color and life.

The confirmed number of dead has risen to more than 40,000.

Officials have said the final number killed by the quake is expected to surpass 50,000.