Shanghai NuStar Nuclear Power Technology Co., Ltd. (NuStar) was founded in 2011 by former Shanghai Jiaotong University professors and graduate students. It is the first and currently the only private company in mainland China that focuses on commercial PWR core technology development and service provision. NuStar holds a strong expertise in reactor physics, not just theories and numerical methods, but also their practical applications. Since its foundation, NuStar has made a unique contribution to the safe and efficient development of nuclear power in China. Besides being a unique software product/technology provider, NuStar is a leading third-party technical services provider in mainland China. Currently, it is undertaking various tasks coming from utilities, research and design institutes and regulatory authority for independent reactor core design review, third-party verification and validation and monographic study. Based on its experiences in education and technology development, NuStar is also a qualified high-level training service provider and regularly provides such services to different utilities. While being rooted in mainland China, the NuStar team is open to collaboration with partners and clients from other countries. They also hope that as the company further grows up and China’s nuclear power industry goes global, they would have the chance of serving overseas customers in the near future.