Help check on the Chinese Historical Geography Network what are the stages of temperature changes in China’s historical periods? Has there been any change after the late Qing Dynasty?

The temperature gradually increased from the Western Zhou Dynasty to the Han Dynasty, reaching its climax in the Han Dynasty. The ebb and flow of Chinese and foreign forces was also reflected in the temperature. When the temperature increased, the Han people went on expeditions to the Yi and Di. When the temperature dropped, the foreign forces Invading China. After the Han Dynasty, the temperature dropped year by year. This cooling flow has been accompanied by the great turmoil in the Central Plains - the Five Husties Rebellion in China. The temperature rose slowly during the Southern and Northern Dynasties. Until the Sui and Tang Dynasties, the temperature rose significantly, the orthodox dynasty quickly unified the country, and feudal society entered another golden age. But this stage is the period when the ice in the entire Canadian Arctic is melting rapidly - what European scholars call the Little Ice Age. Temperatures dropped rapidly over the course of hundreds of years, and global food production decreased significantly. At this time, China was in the Song Dynasty, which was being bullied. In the Southern Song Dynasty, the temperature reached its lowest point, and China fell for the first time. Temperatures rose steadily during the Ming and Qing dynasties, and are still rising today, which also heralds a repeat of some history.