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Bai Kelulun
Economics, business and economic writing
Master's degree in Social Entrepreneurship, Hult International Business School, San Francisco campus.
Undergraduate study in Business Administration at the Autonomous University of Barcelona, with exchange study at Mays Business School, Texas A&M University.
- Core teaching subjects
International curricula: IB Economics.
Competitions and writing: IEO, NEC, IEA, FBLA, BPA, HPEC, John Locke, Marshall, RES, Diamond Challenge and Conrad Challenge.
- Teaching arrangements
Teaching language: selected courses can be taught in English; discuss language arrangements when choosing a course.
More than ten years of economics and business teaching and curriculum research.
- Coaching examples
- 2026 IEO global final: two coached students received individual gold medals; one placed second overall individually worldwide.
- 2026 NEC global round, US station: coached students won the Quiz Bowl component.
Collapse introduction：Bai Kelulun
Bai Kelulun has a master's background in social entrepreneurship and teaches economics, business and economic writing across international curricula and academic competitions.
| Name | Bai Kelulun |
|---|---|
| Education | Master's degree in Social Entrepreneurship, Hult International Business School, San Francisco campus. Undergraduate study in Business Administration at the Autonomous University of Barcelona, with exchange study at Mays Business School, Texas A&M University. |
| Teaching experience | More than ten years of economics and business teaching and curriculum research. |
| Subjects taught | International curricula: IB Economics. Competitions and writing: IEO, NEC, IEA, FBLA, BPA, HPEC, John Locke, Marshall, RES, Diamond Challenge and Conrad Challenge. Teaching language: selected courses can be taught in English; discuss language arrangements when choosing a course. |
Qualifications and experience
Holds teacher certifications from the College Board, Cambridge International and IBO, coaching credentials for IEO, NEC, FBLA and Conrad, and an intermediate-level economist qualification in China.
Served as a Diamond Challenge global-final judge in 2020, 2021 and 2023.
Coaching examples
- 2026 IEO global final: two coached students received individual gold medals; one placed second overall individually worldwide.
- 2026 NEC global round, US station: coached students won the Quiz Bowl component.
- 2025 John Locke economics writing: three of five coached students were shortlisted, including one Very High Commendation.
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Mengdi Jiang
Economics and business
Master's degree in Business Analytics, Schulich School of Business, York University; bachelor's degree in Finance and Business Economics, York University.
Bachelor's degree, Harbin Institute of Technology.
- Core teaching subjects
International curricula: AP Macroeconomics and Microeconomics, IB Economics HL/SL, IGCSE and A-Level Economics through CIE or Edexcel, and university economics.
Competitions: NEC DR/AS, IEO, EEO, CEO, BPA, DECA, FBLA, Diamond Challenge and Columbia ME.
- Teaching arrangements
Teaching language: regular curriculum courses can be delivered entirely in English; competition-course language arrangements can be discussed when choosing a course.
- Coaching examples
- 2026 IEO: one coached student joined Team USA and received a global bronze medal.
- 2026 John Locke: both coached students were shortlisted.
Collapse introduction：Mengdi Jiang
Mengdi Jiang has an academic background in business analytics, finance and business economics. Her teaching covers international economics curricula and economics and business competitions; regular curriculum courses can be taught entirely in English.
| Name | Mengdi Jiang |
|---|---|
| Education | Master's degree in Business Analytics, Schulich School of Business, York University; bachelor's degree in Finance and Business Economics, York University. Bachelor's degree, Harbin Institute of Technology. |
| Subjects taught | International curricula: AP Macroeconomics and Microeconomics, IB Economics HL/SL, IGCSE and A-Level Economics through CIE or Edexcel, and university economics. Competitions: NEC DR/AS, IEO, EEO, CEO, BPA, DECA, FBLA, Diamond Challenge and Columbia ME. Teaching language: regular curriculum courses can be delivered entirely in English; competition-course language arrangements can be discussed when choosing a course. |
Qualifications and experience
Holds an AP teacher certification.
Coaching examples
- 2026 IEO: one coached student joined Team USA and received a global bronze medal.
- 2026 John Locke: both coached students were shortlisted.
- 2025 NEC regional round: all coached students advanced, with two gold, two silver and two bronze awards. In the BPA regional round, two teams received gold and silver respectively.
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Xiaohong Wang
Economics, business and writing
Bachelor's degree in Accounting, University of Utah.
Master's degree in Finance and Accounting, King's College London.
- Core teaching subjects
International curricula: AP, IB, A-Level and IGCSE Economics.
Competitions and writing: IEO, NEC, EEO, SIC, FBLA and John Locke.
- Teaching arrangements
Teaching language: all courses she teaches can be delivered entirely in English.
- Coaching examples
- 2026 NEC: six teams advanced to the China final.
- 2025 NEC: eight teams advanced to the China round and two to the global round. In 2024, six teams advanced to the China round and five to the global round.
Collapse introduction：Xiaohong Wang
Xiaohong Wang has an academic background in accounting and finance. She teaches economics, business and writing, and all her courses can be delivered entirely in English.
| Name | Xiaohong Wang |
|---|---|
| Education | Bachelor's degree in Accounting, University of Utah. Master's degree in Finance and Accounting, King's College London. |
| Subjects taught | International curricula: AP, IB, A-Level and IGCSE Economics. Competitions and writing: IEO, NEC, EEO, SIC, FBLA and John Locke. Teaching language: all courses she teaches can be delivered entirely in English. |
Qualifications and experience
Recognized as an outstanding NEC and IEO coach; holds NEC coach certification and a Chinese high-school teaching qualification.
Coaching examples
- 2026 NEC: six teams advanced to the China final.
- 2025 NEC: eight teams advanced to the China round and two to the global round. In 2024, six teams advanced to the China round and five to the global round.
- 2026 John Locke: five coached students were shortlisted.
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Zhizheng Liu
Economics and economic writing
Bachelor's degree in Economics, University of California, Los Angeles (UCLA).
Master's degree in Computer Science and Engineering, Santa Clara University.
- Core teaching subjects
International curricula: AP, A-Level, IB and IGCSE Economics, and IB EE.
Competitions and writing: NEC DR and Pre-DR, IEO and John Locke.
- Teaching arrangements
Teaching language: experienced in English-medium teaching.
Five years of experience working in international curriculum institutions and schools.
- Coaching examples
- 2022 NEC regional round: one student received an individual silver award, one an individual bronze award, and one team a regional overall bronze award.
- 2022 NEC China final: one student received a Qualifying Test Individual Distinction Award, and coached students also received a Regional Overall Team Award gold result.
Collapse introduction：Zhizheng Liu
Zhizheng Liu has degrees in economics and computer science and engineering. His teaching covers international economics curricula, economics competitions and economic writing, with English-medium teaching experience.
| Name | Zhizheng Liu |
|---|---|
| Education | Bachelor's degree in Economics, University of California, Los Angeles (UCLA). Master's degree in Computer Science and Engineering, Santa Clara University. |
| Teaching experience | Five years of experience working in international curriculum institutions and schools. |
| Subjects taught | International curricula: AP, A-Level, IB and IGCSE Economics, and IB EE. Competitions and writing: NEC DR and Pre-DR, IEO and John Locke. Teaching language: experienced in English-medium teaching. |
Qualifications and experience
Holds a College Board AP teacher certification and received an Oxford AQA outstanding teacher award in 2021.
Coaching examples
- 2022 NEC regional round: one student received an individual silver award, one an individual bronze award, and one team a regional overall bronze award.
- 2022 NEC China final: one student received a Qualifying Test Individual Distinction Award, and coached students also received a Regional Overall Team Award gold result.
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Hui Zhang
Business and economics
Master's degree in Engineering Management, New York University.
Dual bachelor's degrees in Finance and Supply Chain Management, Syracuse University.
- Core teaching subjects
International curricula: AP Microeconomics, Macroeconomics and business, plus A-Level, IGCSE and IB Economics.
Competitions and writing: MEC, SIC, BPA, FBLA, Diamond Challenge, NEC including Pre-DR, Wharton investment competition, Marshall economic writing and John Locke.
- Teaching arrangements
Teaching language: all courses she teaches can be delivered entirely in English.
- Coaching examples
- 2026 BPA: coached practical-division teams and academic-division students advanced to the global final, receiving national gold, silver and bronze awards.
- 2025 BPA: both coached practical-division teams advanced to the global round; one team advanced in 2024.
Collapse introduction：Hui Zhang
Hui Zhang has an academic background in engineering management, finance and supply chain management. Her teaching covers economics and business curricula, business competitions and economic writing; all courses she teaches can be delivered entirely in English.
| Name | Hui Zhang |
|---|---|
| Education | Master's degree in Engineering Management, New York University. Dual bachelor's degrees in Finance and Supply Chain Management, Syracuse University. |
| Subjects taught | International curricula: AP Microeconomics, Macroeconomics and business, plus A-Level, IGCSE and IB Economics. Competitions and writing: MEC, SIC, BPA, FBLA, Diamond Challenge, NEC including Pre-DR, Wharton investment competition, Marshall economic writing and John Locke. Teaching language: all courses she teaches can be delivered entirely in English. |
Qualifications and experience
Holds a College Board AP teacher certification.
Coaching examples
- 2026 BPA: coached practical-division teams and academic-division students advanced to the global final, receiving national gold, silver and bronze awards.
- 2025 BPA: both coached practical-division teams advanced to the global round; one team advanced in 2024.
- SIC season S14: one coached student received an individual silver award. In 2026, a coached Diamond Challenge team reached the US semifinals.
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