Summary of Key Points Core Viewpoint - The upcoming three days will see significant temperature fluctuations in northern China, with a peak followed by a rapid drop due to cold air, while southern regions will experience notable rainfall, including strong convective weather, prompting the public to plan their travel accordingly [1][2][3]. Group 1: Northern Weather Conditions - Northern regions experienced a temperature rise, with some areas in Jiangnan, Huazhong, and Huanghuai increasing by approximately 6°C to 10°C, reaching above 25°C, and some areas hitting around 30°C [2]. - Major cities like Beijing are expected to reach a high of 32°C, marking a new temperature record for the year, while Zhengzhou may rise to 35°C [2]. - Following the temperature peak, a cold front will lead to a significant drop in temperatures, with cities like Shenyang dropping from 25°C to 15°C and Tianjin from 31°C to 25°C [2]. Group 2: Southern Weather Conditions - Southern regions, particularly in Jiangnan and Huazhong, will see a return of rainfall, with some areas experiencing heavy rain and strong convective weather, including thunderstorms and gusty winds [3][7]. - Recent rainfall data indicates that areas in Yunnan, Guangxi, Guangdong, and Hainan have experienced heavy to torrential rain, with localized areas in Guangdong and Hainan facing severe downpours [3]. - The Central Meteorological Observatory forecasts that the next two days will bring significant rainfall from the southwest to the southeast, affecting regions from southwestern China to Jiangnan and Huazhong, with potential for localized heavy rain [3][5].