Vietnamese leader To Lam’s state visit to South Korea this week has offered a first glimpse into President Lee Jae-myung’s new foreign policy direction for Southeast Asia, as both countries seek to navigate US-China rivalry and Washington’s economic upheaval.The four-day visit began on Monday, with the two leaders pledging to deepen economic cooperation and expand bilateral trade to US$150 billion by 2030, a big boost from the current US$86.8 billion.Lee noted that South Korea had invested...