Excuse me: Why is it hot in summer and cold in winter in China?

Because we are in the northern hemisphere, and most parts of China have subtropical monsoon and temperate continental climate. The subtropical monsoon climate, influenced by the southeast monsoon in summer, is warm and humid because the wind from the ocean carries water vapor, while the wind from the northwest inland has no water vapor in winter, so Leng Xia is hot in winter, while the season in the southern hemisphere is just the opposite to ours. I wonder if you can understand this.