3. Chinese scientists found ¡°all-time low ozone¡± high above the Qinghai-Tibet Plateau.
Using data from satellite sensing and a field survey, Chinese scientists have procured a surprise finding that high above the Qinghai-Tibet Plateau exists ¡°all-time low ozone¡± in summer. Experts hold that this is another major scientific discovery since the ozone cavity over the South Pole was discovered in 1985, and that it has drawn wide attention from science and technology circles worldwide.
4. Oldest-known vertebrate fossils found in China.
The fossilized Kunming fish and Haikou fish, found by Prof. Shu Degan, head of the Research Institute of Early Life of Northwest University, and his collegues, and the fossilized Haikou insect, discovered by a research group led by Chen Junyuan, a research fellow of the Nanjing Institute of Geological Biology of the Chinese Academy of Sciences, are the oldest vertebrates in the world discovered so far. They can be traced back 530 million years, according to textual research. These fossils were discovered in the stratum of the early Cambrian Period, which dates back 530 million years, in Haikou District, Kunming City, Yunnan Province. The discovery of these fossils not only reveals a complete picture of the emergence of life in the Cambrian Period, it also provides reliable evidence for the origin of vertebrates and their important organs. These discoveries will help to rewrite the history of the origin of vertebrates. s

5. Chronoclines of the Xia, Shang and Zhou dynasties inferred.
Chinese scholars have concluded that the demarcation lines between the Xia and Shang dynasties and between the Shang and Zhou dynasties range from 1600 B.C. to 1500 B.C., and from 1050 B.C. to 1020 B.C., respectively.

6. China made great achievements in its first scientific investigation of the North Pole
China made its first scientific investigation of the North Pole from July to September, 1999. For the first time, the Chinese government directly organized this large-scale comprehensive scientific investigation of the North Pole, and for the first time China's scientific research ship made a voyage to the Arctic Ocean.
This investigation into the North Pole is another breakthrough in China's polar investigations, which have been continuing for the past 15 years. It makes China one of the few countries to have made investigations of both the North and South poles. A series of significant achievements were made during this investigation.

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