In the United States, people who study pure mathematics can generally find a postdoctoral position at the worst after graduation. Many people who don't even get a doctorate can find a postdoctoral position, let alone a doctoral graduate from a famous university like Purdue University.
However, because Mo Zongjian was angry with Zhang and refused to write a letter of recommendation, Mo Zongjian's own influence was not small, so no university or research institute accepted Zhang.
Zhang ran into a wall everywhere and couldn't find a job in his own bank to make a living, let alone a lecturer position, even a postdoctoral position.
He has traveled a lot, worked in restaurants and motels in China, and once had nowhere to live, so he had to sleep in the car and eat at the home of students studying in the United States in Peking University.
Later, he found a job as a waiter in Subway (a famous fast food chain), responsible for washing dishes and delivering takeout.
While working in a restaurant, Zhang met a waitress from China, Shandong Province, and later got married. She is Zhang's wife.
1999 An alumnus who graduated from the Department of Chemistry in Peking University opened several subway franchise stores in the United States, and later learned by chance that the subway attendant Zhang was from high flyers, Peking University. He felt very sorry for his experience. After learning that he graduated from the Department of Mathematics, he was asked to help several of his stores calculate the tax returns (the tax in the United States is extremely complicated, and most people don't count it). He was very satisfied with the tax results, so he recommended him for the same session.
Tang Puqi works in a large computer company. At that time, he went to new york to attend an academic conference. He met this chemistry classmate. After meeting Zhang, I learned that he majored in mathematics, so I asked him a question about computer algorithms. I didn't expect Zhang to solve the problem after three weeks. Tang Puqi was shocked, so he applied for this patent in partnership with Zhang, and then recommended him to another classmate, Ge Liming.
Ge Liming was very popular at the University of New Hampshire, so he was introduced to a job as a lecturer at the University of New Hampshire.
Zhang finally found a stable job. Although this job is very frustrating, you are a temporary worker. You can get kicked out of school at any time in the last class. And the lecturer is not a scholar, not a scholar circle (only assistant professors, associate professors and professors are scholars), but a teacher. Moreover, the University of New Hampshire arranged few classes for him, so his income was not much. Moreover, New Hampshire University is a very ordinary university in the United States (Zhang became one of the few successful people in the school after becoming famous), and its mathematics department has no position in the industry.
But after all, this is my job. With a fairly good income (relative to a waiter), I can concentrate on my math.