Group 1 - The typhoon "Phoenix" is expected to weaken as it moves northeast, with its impact on Zhejiang province ending by Wednesday night, leading to improved weather conditions [1] - A strong cold air mass is forecasted to bring significant temperature drops across China, with the cold front first affecting Xinjiang and then spreading to other regions [2] - In Hangzhou, temperatures are predicted to drop significantly next week, with highs between 10-14°C and lows reaching around 5°C [2] Group 2 - The cold air mass will primarily cause a drop in temperature, with some areas experiencing light rain on Monday, but improving weather conditions by Tuesday [3] - Despite the sharp drop in temperature, Hangzhou will still experience sunny weather until next Friday, allowing for a brief continuation of autumn-like conditions [3]

Core Points - A strong cold air mass is affecting the central and eastern regions of China, leading to a significant drop in temperatures, especially in the northern areas [1][2] - The southern regions are also experiencing a decline in temperatures, with many areas expected to set new low records [3][4] Temperature Changes - From October 19 to 20, northern temperatures are expected to be 8 to 10 degrees Celsius lower than the average for this time of year, resembling early to mid-November conditions [3] - Specific examples include Taiyuan, where the temperature on October 20 is forecasted to be only 7 degrees Celsius, marking a new low since the start of autumn [3] - In the south, regions like Jiangnan are predicted to see maximum temperatures drop below 20 degrees Celsius by around October 21, with Fuzhou's temperature expected to fall from over 35 degrees Celsius to 21 degrees Celsius [3] Rain and Typhoon Impact - Continuous rain is expected in the eastern Southwest and southeastern Northwest regions, with the approach of Typhoon "Fengshen" increasing wind and rain in coastal areas of South China [4][5] - The Central Meteorological Observatory issued a blue alert for Typhoon "Fengshen," which made landfall in the Philippines and is expected to strengthen as it moves towards the South China Sea [5] - The typhoon's maximum wind speed is forecasted to reach 30 to 35 meters per second, with significant impacts anticipated in South China starting from October 19 [5][6]