Reasons for Qingdao's health on September 19, 222

hello, do you want to ask what caused the temperature drop in Qingdao on September 19th, 222? The reason for the temperature drop in Qingdao on September 19th, 222 was due to the combined influence of typhoon "Nanmadu" circulation and cold air. Qingdao Daily/Guanhai News reported on September 19th that under the combined influence of typhoon "Nanmadu" circulation and cold air, there was strong wind and cool weather in Qingdao today, and the gusts in inland areas reached 6-8.