In the morning of April 6, 2023, Mr. He Peng successfully passed his PhD oral comprehensive exam. The title of his exam report is “The Road to Downstream Carbon Trading in Inland Transport: Policy, Research, and the Future”. His profound knowledge and excellent presentation helped him win a good evaluation from the external examiner, Dr. Amin Hammad, and other examining committee members (Drs. Zhi Chen, Rebecca Dziedzic, and Chunjiang An).