Changchun was named after Emperor Qianlong. Changchun is the first city in China that was designed by foreign experts. Changchun is the only city in China that was modeled after foreign capitals (Paris, (Canberra) Changchun is the first city in Asia to fully popularize toilet bowls. (1930s) Changchun is the first city in Asia to fully popularize pipeline gas. (1930s) Changchun is the first city in Asia to realize the underground connection of main roads. (1930s) Changchun is the first city in China to plan the subway (194 1 year). Changchun is one of the four major garden cities in China (Nanjing, Changchun, Hangzhou and Kunming). Changchun is the second greening city in China. (Nanjing is the first) Changchun is the city with the highest proportion of students from China University in the urban population (400,000/3 million). Changchun has the largest and most comprehensive university in China, Jilin University, which is also the first comprehensive university founded by China KP. There are also 26 universities such as Northeast Normal University. Changchun is also a famous city of science and education in China. Changchun is the cradle of China's automobile industry. The first car of New China was born in Changchun. The first car of New China was born in Changchun. The first car is the largest automobile manufacturer in China. Changchun is the cradle of new China's film industry. The first film of New China was born in Changchun. At present, most China adults grew up watching long-term movies. Yes. Changchun still has the only world-class movie theme park in China, Changying Century City. Changchun is the cradle of China rail vehicles. The first tram in New China was born in Changchun. The first subway in China was born in Changchun. The first maglev train in China was born in Changchun. (Experiment) Changchun Bus Factory is the largest rail vehicle manufacturer in China and the fifth largest in the world. (The products are Beijing Subway, Beijing Light Rail, Wuhan Light Rail. Chongqing monorail light rail, Guangzhou subway, Pyongyang subway, Teheran subway, etc., and most railway buses in China) Changchun is the cradle of China's optical career. The first laser in China was born in Changchun. The first electron microscope in China was born in Changchun. In addition, there are dozens of China firsts. However, it is not as important as the first two. Changchun Institute of Optics and Mechanics is the earliest and most prestigious optical research institution in China. Changchun is the cradle of gene biochemistry in China. China's first genetically engineered hepatitis B vaccine was born in Changchun. China's first genetically engineered interferon was born in Changchun. China's first monoclonal antibodies were born in Changchun. China's AIDS vaccine was also developed in Changchun. Changchun Institute of Biological Products is the earliest and largest vaccine research and production unit in China. Changchun has also contributed to China's space industry. The payload (main components) and glass windows of Shenzhou VI were developed by Changchun Institute of Optics and Mechanics, Chinese Academy of Sciences. The refractories of Shenzhou VI were developed by Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Changchun is the cradle of China astronauts. Yang Liwei, Fei Junlong, Nie Haisheng and other China astronauts all graduated from Changchun Air Force Aviation University. It is reported that it will also be the first female astronaut in China. Changchun is also the first forest city in China, with trees on both sides, and Jingyuetan National Forest Park, the largest artificial forest in Asia with an area of 150 square kilometers, is in the south. Changchun is also the largest grain city in China, with fertile land around it and the top ten grain-producing counties in China. Changchun accounts for three. China ranks first in terms of commodity grain output and per capita possession. Changchun Haoyue Group is the largest beef processing and export enterprise in Asia, and its annual processing capacity ranks fourth in the world. Jilin Deda in Changchun is one of the world's top 500 agricultural and animal husbandry enterprises, national industrial enterprises, national foreign-invested enterprises and national industrial enterprises in import and export. Changchun Dacheng Group, the largest broiler slaughtering and processing enterprise in Asia, is the largest corn deep-processing enterprise in Asia. Its processing capacity ranks second in the world. For many years, Changchun's per capita grain, per capita commodity grain, commodity rate and export volume have ranked first among large and medium-sized cities in China, with no disaster or shortage. Six of the top ten grain-producing counties in China are in Changchun. The fertile black soil in the northeast was once transported to Shanhaiguan as organic fertilizer. Changchun is also the hometown of sika deer, and it still has the largest breeding base in China. The single-crowned crane on the Horqin prairie in the west echoes the Siberian tiger in the Changbai Mountain in the east. You sing and I laugh. The three treasures in Northeast China are well-known overseas. In order to preserve the natural features of the "land of Longxing", before the Opium War, the Qing government only allowed the victims in the customs to enter Liaoning alone in the year of catastrophe, and imposed a strict blockade on the northeast. It even built a 450-kilometer separation wall in Jilin (known as the new border of Jilin in history), and Jilin became a forbidden city. Nevertheless, the great temptation of "beating the roe deer and scooping up the fish, and the pheasant falling in the rice pot" strongly stimulated the adventurers to forget the king's law and take the ban on development. When it was discovered by foreign war psychopaths, it once became a fish in the mouth of others. This is going to change it into yellow Russia, and that is going to change it into Japan. The fight is black and blue. The head is broken, the limbs are broken, and the brains are cracked. Hitler also extended a foot to the soybeans here, so keep your mouth shut. Among the proven minerals in China (136 species), there are 72 species in Jilin Province. There are 4 1 species in the top ten in China. There are 12 kinds of non-ferrous metals (national proven 15 kinds), and many reserves rank first in the country.