Today, 135 years ago, on March 7, 1890 (February 17, 1890), meteorology and geography was born. On March 7, 1890, Zhejiang was born in Zhejiang. Zhejiang returned from the United States after receiving a doctorate in 1918. He first opened courses in geology, meteorology, world climate and world geography in China, and trained a group of modern geologists and meteorologists to prepare conditions for the pioneering of modern geology and meteorology in China. The study of climate change in China's history was the most time spent, the most profound and the greatest achievement in China. Over the past 50 years, he continued to study the country's climate change for 5,000 years. At the age of 82, he wrote the first paper on the study of climate change in China for five thousand years