At 14:30 on February 28th, the Haidong Meteorological Observatory issued a yellow warning for a cold wave: it is expected that from 08:00 on March 1st to 08:00 on March 3rd, Ledu District, Ping an District, Minhe County, Huzhu County, Hualong County, and Xunhua County in Haidong City will experience cold wave weather. The daily maximum temperature in the city will decrease by 6-8 ℃ cumulatively, and the decrease in temperature in river valleys and high-altitude mountainous areas can reach more than 10 ℃. Among them, on the night of the 1st, there was light to moderate snow in the whole city, and some towns in Hualong, Xunhua, Minhe had moderate to heavy snow. In the afternoon, there was a wind of 4-5 levels, and local gusts could reach 8 levels or above. It is necessary to prevent the adverse effects of cooling, blowing, and snowfall weather on transportation, agriculture, animal husbandry, energy supply, etc. Defense guidelines: 1. The government and relevant departments should carry out emergency work to prevent cold waves according to their responsibilities; 2. Individuals should pay attention to adding clothes to keep warm and try to minimize going out; 3. Take measures to prevent cold in agriculture, forestry, animal husbandry, and animal husbandry, and do a good job in preventing freezing damage to crops, trees, livestock, etc.