South Korean President Lee Jae Myung and Vietnamese leader To Lam agreed to expand cooperation on energy security, supply chains and infrastructure during the former's four-day visit to Hanoi, Yonhap News Agency reported on April 22. The memorandums of understanding include two on nuclear power feasibility studies and financing; a power infrastructure agreement for renewable energy and grid modernization, artificial intelligence, cybersecurity and digital transformation cooperation; and a contract to construct part of Ho Chi Minh City's metro system.