JW SUN LAW FIRM

A Professional tax & Business Law Firm
Your Trusted Tax Law Partner​

We are committed to delivering strategic, results-driven legal solutions in taxation and business law. Headquartered in Pasadena, California, we serve clients throughout the United States and globally, including individuals, entrepreneurs, corporations, and cross-border investors.
As experienced tax attorneys and business tax lawyers, we focus exclusively on federal tax, California state tax, and international tax compliance and planning. Our services include:
IRS audit representation
Tax dispute resolution and appeals
International tax planning and foreign asset reporting (FATCA/FBAR)
Business entity structuring and corporate tax strategy
Real estate and investment tax strategies
Trusts, estates, and gift tax planning
With deep legal knowledge and practical insight, we guide our clients through today’s complex and ever-changing tax landscape, protecting their interests and supporting long-term success. Whether you’re facing a tax controversy or seeking proactive planning, JW SUN LAW FIRM is your reliable partner in all matters of tax law.

Mission.

Our mission is to deliver high-quality, responsive, and solution-driven legal services in taxation, business, and international compliance.
We are committed to: Representing our clients with integrity, diligence, and professionalism;
Providing clear, accessible guidance in navigating IRS, state, and international tax challenges;
Designing strategic legal structures that protect assets, minimize risk, and support sustainable growth;
Building long-term relationships based on trust, transparency, and measurable value.

Vision.

Our vision is to become a trusted legal partner for individuals, entrepreneurs, and global investors seeking clarity, confidence, and integrity in tax and business law.
We aim to bridge legal precision with practical strategy—empowering clients to thrive in a complex and evolving financial world.

Our Team

Our Team

Justin Jingwei Sun
California Attorney, Chinese Attorney, I.R.S EA

Mr. Sun has extensive experience in U.S. and international legal and tax matters. His practice focuses on U.S. company formation, cross-border investment, and tax planning for clients, and new immigrants, multinational M&A, and IRS/state tax audits. In addition, he advises on asset recovery, enforcement of international arbitration in the U.S., and compliance with U.S. government sanctions and export restrictions.

Stephen Lam
Former mayor of the City of Monterey Park

Mr. Lim started his career as a banker and, after years of experience in mortgage and commercial lending, started up his own financial and real estate firm at the age of 26. With the success of these businesses, he founded Lams USA Group. He has always been a community leader and activist. He has been appointed to numerous city commissions for over 10 years.

Yaling Zhou
Bar Admissions of China, State of New York and Connecticut

Fluent in both Chinese and English and possessing deep cross-cultural communication skills, Ms. Zhou provides clients with practical, feasible, and cost-effective comprehensive legal services for expanding into overseas markets. She is a trusted legal partner for your global legal needs.

Xinyu Zhang
Ph.D. Research Scientist

Xinyu Zhang, Ph.D., is a distinguished Research Scientist, specializing in the intersection of computational biology and artificial intelligence.
Dr. Zhang’s career spans both academic research and industrial application. He leverages his cutting-edge technical background to lead the development of specialized AI models and software. His work pioneers the integration of artificial intelligence with legal practice, significantly enhancing the efficiency and precision of legal processes.

Crystal Liu
CPA, EA, and MSA

Ms. Liu has extensive experience in finance and accounting. She graduated from China Foreign Affairs University and California State University, Los Angeles, and she has a Master’s degree in Accounting. She is also a licensed CPA and Enrolled Agent (EA). Ms. Liu has served as Finance Manager for the U.S. subsidiary of a publicly listed Chinese company, Chief Financial Officer of a pharmaceutical company, and Chartered Financial Administrator (CFA) for a U.S. school district.

Mark Shixiong Lin
Chinese law consultant

Graduating from one of the top universities and an expert in helping IT businesses grow, Mark has been a legal professional in the Chinese law field.