An excavator works at the spot of landslide in Yunlong County of the Dali Bai Autonomous Prefecture, southwest China's Yunnan Province, Dec. 18, 2011. The landslide, which occurred at 7:50 p.m. Saturday, has blocked the Bijiang River and formed a barrier lake, threatening hundreds of people. Authorities in Yunlong county are rushing to evacuate local residents and divert water from the river.