Soldiers jump into the man-made sluice channel to clear objects obstructing the water drain from the Tangjiashan "quake lake" in Mianyang City, Southwest China`s Sichuan Province, June 7, 2008. [Xinhua]

A technician watches the screen to supervise the water level of the Tangjiashan "quake lake" in Mianyang City , Southwest China`s Sichuan Province, June 7, 2008. [Xinhua]

A soldier clears objects obstructing the water drain from the Tangjiashan "quake lake" in Mianyang City, Southwest China`s Sichuan Province, June 7, 2008. [Xinhua]

Soldiers prepare to bomb the reefs obstructing the water drain from the Tangjiashan "quake lake" in Mianyang City, Southwest China`s Sichuan Province, June 7, 2008. [Xinhua]

Excavators are submerged in water flowing out of the Tangjiashan "quake lake" from a manmade sluice channel in the quake-devastated Mianyang City, southwest China`s Sichuan Province, on Saturday, June 7, 2008. [Xinhua]