Dangjin-si in South Korea has experienced substantial growth and innovation under the leadership of Mayor Oh Sung-hwan. The city has surpassed 170,000 residents with a thriving economy, marked by the revitalization of local commercial districts and strategic initiatives. Dangjin-si has been designated as Chungnam's first hydrogen city and has signed agreements for industrial complex development, business innovation parks, and healthcare facilities. The city is actively promoting new industries like hydrogen, mobility, and drones to diversify its economic base. With a focus on tourism, Dangjin-si has seen a rise in visitors, reaching 8.68 million in recent years. Plans for a marine tourism complex aim to attract 2 trillion won in private investment. Additionally, the city is transitioning towards renewable energy, particularly hydrogen, to reduce carbon emissions and become a carbon-neutral city. Notably, Dangjin-si is driving efforts to attract investments, create new industrial complexes, and position itself as a hub for high-tech industries. The city is committed to becoming self-sufficient by 2040 and transforming into an industrial center. Various hydrogen-related projects have been initiated, including hydrogen transportation complex base construction and carbon capture hydrogen production projects. Mayor Oh Sung-hwan envisions Dangjin-si as a leading city in South Korea, emphasizing sustainable development and economic growth. The city's innovative approach to urban development, technology integration, and renewable energy signifies a positive trajectory towards a prosperous future.