Adv. Wen Sun, LL.B. (hons) B.Sc.Econ (Xiamen University), LLM (Peking University), MPhil (Cantab)，LLM (Harvard) is an Associate Fellow of the Centre for International Sustainable Development Law (CISDL) and a legal researcher for the Biodiversity Law and Governance Initiative (BLGI). She is also a Yenching Scholar.

Wen has an interdisciplinary background in law, economics and mathematical finance, sociology, and international relations. She has been educated in China, the U.S., the Netherlands, and the U.K. Wen has done pro bono legal research work for the Inter-American Court of Human Rights, where she oversaw research for a case that required consideration of the intersection of environmental law and human rights, particularly the right to health, in the context of pollution. She also worked for the United States District Court for the Southern District of California, Jones Day Law Firm, and Yingkun Law Firm. Wen actively contributed to the projects related to the Ministry of Ecology and Environment and maritime courts in China. At Cambridge, she also served as a certified environmental auditor for the Green Impact Programme.

Wen is interested in applying interdisciplinary approaches to international environmental governance. She focuses on the interaction between international law and economics and finance, as well as the interplay between international environmental governance and human rights protection. Her research includes discussing international legal protection of people displaced by climate, using the regime complex framework to analyse transnational wildlife crime, using interdisciplinary research methods to investigate the impact of Chinese and Western philosophy and anthropology on international law, analysing the application of Rights of Nature, and exploring the design and implementation of biodiversity finance.