 This study uses flow analogs to estimate the contribution of atmospheric circulation to record breaking precipitation and hot events in the Yangtze River and South China during the Mayu period in 2020, finding that the atmospheric circulation explains 70.73% and 43.61% of these extreme events, respectively. The study also shows that climate change has increased the occurrence risk of an event reaching or exceeding the 2020 Mayu amount under similar atmospheric circulation conditions by 5.1 times and that hot events similar to the 2020 event cannot occur under past climate, while those reaching or exceeding a one-standard deviation threshold increased from 0.58% under past climate conditions to 68.83% under the present climate, 99% of which can be attributed to climate change. These results are beneficial for understanding and predicting extreme events in the context of climate change in this region. This article was authored by Yang Buyi and Chengqian. We are article.tv, links in the description below.