Ever since the Sichuan quake, rescue teams, have worked non-stop for more than 100 hours. The People's Liberation Army is at the forefront of the effort. International teams are lending valuable help.

This is Hongqi town in Shifang city -- 144 hours after the earthquake. Relatives say one victim remains buried in these ruins. Life-saving equipment continues to inch through difficult terrain and remains at some distance from the scene. But a team of rescuers from Singapore is at the scene, using rescue dogs to sniff for signs of life.

A Singaporean rescuer said, "We need to keep a distance from the dog, as we may put him off the scent if we get too close."

After the dog had searched for a short period, rescuers decided to dig in -- up to their hips. Rubble was hauled out in basins and dustpans.

An excavator came into action, shifting huge chunks of rubble. The rescuers then penetrated inside the dust shrouded cavern.

PLA soldiers were not far behind, and they too entered the debris.

After 40 minutes the searchers found no sign of life. But the rescue work goes on -- continuing until every last hope of finding somebody alive, has been exhausted.

(CCTV May 21, 2008)