astronomy

Sun Dahai

Sun Dahai is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sun Dahai rather than just read about it. In short: Sun Dahai (Chinese: 孙大海; born June 1963) is a Chinese politician and academic who currently serves as vice chairman of the Standing Committee of the Hainan Provincial People's Congress. He previously held several key positions in Tianjin and Hainan, including secretary-general of the Hainan Provincial Committee of the Chinese Communist Party (CCP) and head of the General Office of the Hainan Provincial Committee.

Key takeaways

Sun Dahai belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sun Dahai to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sun Dahai from memory before moving on to harder problems.

Reference excerpt

Sun Dahai (Chinese: 孙大海; born June 1963) is a Chinese politician and academic who currently serves as vice chairman of the Standing Committee of the Hainan Provincial People's Congress. He previously held several key positions in Tianjin and Hainan, including secretary-general of the Hainan Provincial Committee of the Chinese Communist Party (CCP) and head of the General Office of the Hainan Provincial Committee.

Biography Sun was born in Xiangyang, Hubei Province, in June 1963. He studied chemistry at Sun Yat-sen University from 1979 to 1983 and obtained a master's degree in analytical chemistry there in 1986. After joining the Chinese Communist Party in June 1986, he began his career in July the same year as a lecturer in the Department of Chemistry at Huazhong Institute of Technology (now Huazhong University of Science and Technology). He later pursued doctoral studies in analytical chemistry at Sun Yat-sen University, completing his Ph.D. in 1990. Following his doctoral studies, Sun remained at Sun Yat-sen University as a lecturer and then as an associate professor. During this period, he briefly served as assistant to the director of the Guangning Glucose Factory in Guangdong Province (1990–1991) and was promoted to associate professor in 1992. Between 1994 and 1997, he conducted postdoctoral research at Indiana University and served as a visiting researcher at the University of Missouri. In 1997, Sun returned to China and joined Xiamen University, where he served as deputy director of the Division of Analytical Chemistry and deputy director of the Ministry of Education’s Open Laboratory for Analytical Science. He was promoted to full professor in 1998 and became a senior visiting scholar at the University of Sheffield in 1999. Sun entered public administration in 2000 as assistant director of the Xiamen Torch High-tech Industrial Development Zone Administrative Committee, later serving as deputy director and Party committee member. From 2007, he concurrently served as deputy secretary of the Torch High-tech Zone Working Committee and deputy director of the Xiamen Municipal People’s Congress Foreign Affairs Committee. In 2010, he was transferred to Tianjin to serve as deputy director of the Binhai High-tech Industrial Development Zone, where he later became a Party committee member and deputy director of the Management Committee. In 2013, Sun was appointed Party secretary of the Tianjin International Joint Academy of Biomedicine. He subsequently served as member and standing committee member of the Binhai New Area Party Committee and head of its Publicity Department. From 2017 to 2018, he was executive vice president of the Tianjin Party School and Tianjin Administrative College. In July 2018, Sun was transferred to Hainan Province, where he served as deputy secretary-general of the Hainan Provincial Committee of the Chinese Communist Party and later as executive deputy director of the offices for deepening reform and free trade port development. From January 2020 to early 2022, he served as member of the Standing Committee of the Hainan Provincial Committee of the Chinese Communist Party, secretary-general of the committee, and director of the General Office, concurrently leading the provincial reform and free trade port offices. In January 2023, Sun was elected vice chairman of the Standing Committee of the Hainan Provincial People’s Congress.

Honors As a scholar, Sun participated in more than ten major research projects, including the national “863” high-tech program on marine science. He has received numerous awards for his academic and administrative achievements. In 2003, he received the “Outstanding Achievement Award for Returned Overseas Scholars” jointly granted by six Chinese ministries and was named an “Advanced Individual in the National Torch Program.” He also received the “China Youth Science and Technology Innovation Award” the same year and was recognized as a top talent in Xiamen. In 2005 and again in 2008, the Ministry of Science and Technology honored him as an “Outstanding Contributor to the Torch Program.”

References

Worked examples

Example 1 — a first encounter with Sun Dahai

Start with the simplest possible case. Write down what Sun Dahai claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sun Dahai before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sun Dahai ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sun Dahai

In research: Sun Dahai appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sun Dahai in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sun Dahai is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1963 births, Academic staff of Sun Yat-sen University, Academic staff of Xiamen University, so understanding it makes those chapters shorter.
In everyday life: Look for Sun Dahai outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sun Dahai in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sun Dahai means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sun Dahai out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sun Dahai in simple terms?

Why does Sun Dahai matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sun Dahai?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sun Dahai.