At 16:00 on July 4, the meteorological observatory of Lang County in Xizang continued to issue the blue warning signal of heavy rainfall: it is expected that from 20:00 on July 4 to 20:00 on July 5, there will be light to moderate rain (5~17mm) in most of Lang County, and moderate to heavy rain (17~38mm) in Dengmu, Zhongda, Laduo and other towns and high altitude mountainous areas. Defense measures: 1. It is necessary to prevent secondary disasters such as flash floods, mudslides, rising water levels of small and medium-sized rivers, farmland waterlogging, and urban and rural waterlogging that may be caused by heavy precipitation; At the same time, the road is slippery and the visibility is low on rainy days, so attention should be paid to road traffic safety. 2. Prevent the adverse effects of continuous heavy rainfall on outdoor workers engaged in major construction projects, cordyceps harvesting, and other outdoor operations.