Beijing - Drainage of the dangerous Tangjiashan "quake lake" in Sichuan Province has gone smoothly since Saturday, but the local government remained on on high alert, state-run media said Sunday.
Army engineers fired missiles to blast boulders in a man-made sluice channel to accelerate water drainage, Xinhua news agency said.
The agency said water flowing through the sluice channel widened from previously less than five metres to about 9 metres.