In 1963, the yield of natural insulin A chain and B chain increased from 5 ~ 10% to about 50%. From 65438 to 0964, the peptide synthesis group led by Niu Jingyi and Gong Yueting synthesized B chain artificially. Successfully recombined with natural A chain to construct insulin.

1965 The Institute of Organic Science of China Academy of Sciences cooperated with the Department of Chemistry of Peking University, and the joint research group led by Wang You and Xing completed the chemical synthesis of insulin A chain. The B chain of insulin synthesized by Shanghai Institute of Biochemistry was successfully recombined, and the synthetic bovine insulin crystal with the same specific activity and antigenicity as natural insulin was purified.

Moreover, its crystal shape and enzyme digestion map are the same as those of natural products. The success of insulin synthesis declared that China scientists won the "World Champion" in this scientific competition after 8 years of research.

Subsequently, Cao presided over the drafting of the paper, and this important scientific research achievement was first published in China Science in the form of a briefing in 1965 1 1 month, and the full text was published in 1966.

2. 1973, Yuan Longping, an agricultural scientist, successfully cultivated indica hybrid rice, which was called "the second green revolution".

Since the founding of New China, one of the remarkable achievements of agricultural science and technology in China is the breeding of indica hybrid rice. Since 1976 was widely popularized in China, the rice yield in China increased by 240 billion kilograms only from 1994. In addition, the technology is also exported to the United States and other countries and regions.

The research of hybrid rice began in 1964. At that time, Yuan Longping, who worked in Anjiang Agricultural School, Hunan Province, first discovered the natural male sterile plant of rice, and led his assistant to carry out related research.

They used wild sterile plants for the first time in China to achieve a major breakthrough in the matching of three lines (sterile line, maintainer line and restorer line) of hybrid rice (1973), and solved many technical problems such as "superior but not early" and "early but not excellent" of hybrid rice. The popularization and application of hybrid rice technology in China made China the first country in the world to use heterosis for rice production.

3. 1954, the first people's congress was held, marking the establishment of the people's congress.

The first National People's Congress of People's Republic of China (PRC) has more than 200 deputies/kloc-0. Among these representatives, there were representatives of various democratic classes and parties in China at that time, including model workers of industry and agriculture, heroes of the army, famous literary, artistic, scientific and educational workers, and representatives of business and religious circles.

Include representatives of all ethnic group and people from all walks of life in China. 177 representatives of ethnic minorities attended the meeting. This is a conference to show the unprecedented unity and unity in China's thousands of years of history.

Representatives attending this conference include political and social activists from the Reform Movement of 1898, the Revolution of 1911, the May 4th Movement, the first revolutionary civil war, the second revolutionary civil war, War of Resistance against Japanese Aggression, the third revolutionary civil war and many historical periods after the founding of People's Republic of China (PRC).

Their ages range from 18 to over 90 years old. In the past, women who were oppressed at the bottom of society had 147 representatives at this meeting.

4.2008 Beijing Olympic Games

The 29th Summer Olympic Games opened on August 8th, 2008 in Beijing, the capital of People's Republic of China (PRC), and closed on August 24th, 2008. The host city is Beijing, the capital of China, with 204 participating countries and regions and athletes 1 1438.

This Beijing Olympic Games has set 43 new world records and 132 new Olympic records. A total of 87 countries won medals in this event. China topped the medal tally with 5 1, becoming the first Asian country to top the medal tally in Olympic history.

5. The return of Hong Kong and Macao

On July 6th, China resumed the exercise of sovereignty over Hongkong. Hong Kong implements the capitalist system and the policy of "Hong Kong people ruling Hong Kong". It enjoys independent legislative, judicial and administrative powers and is exempt from paying customs duties and tariffs to the central government. It is famous for its clean government, good public order, free economic system and perfect rule of law.

On February 20th, the China government resumed the exercise of sovereignty over Macao. After Macao's return to China, its economy developed rapidly and became more prosperous than before. This is a successful example of one country, two systems.

Macao is an international free port, one of the regions with the highest population density in the world and one of the four largest gambling cities in the world. Its famous light industry, tourism, hotels and casinos have made Macao prosperous and become one of the most developed and affluent regions in the world.

Baidu Encyclopedia-Hong Kong and Macau

Baidu encyclopedia -2008 Beijing Olympic Games

Baidu Encyclopedia-The First National People's Congress of People's Republic of China (PRC)

Baidu encyclopedia-indica hybrid rice

Baidu encyclopedia-bovine insulin