Seoul: The funeral of former Prime Minister Lee Hae-chan, who passed away while in Vietnam, is set to take place over five days this week, combining both "social" and "institutional" funeral formats to honor his societal contributions, officials have announced. According to Yonhap News Agency, Lee, who was serving as a senior vice president of the Peaceful Unification Advisory Council (PUAC), succumbed to cardiac arrest on Sunday at a hospital in Ho Chi Minh City. The PUAC, along with the ruling Democratic Party, will host the funeral from Tuesday to Saturday. Lee's remains are expected to arrive at Incheon International Airport early Tuesday, after which they will be transported to the designated venue for the funeral services. PUAC officials explained that the ceremony would follow the format of a social funeral, reserved for influential societal figures, as well as an institutional funeral organized by a specific organization. This extended five-day period deviates from the standard three-day funeral ser vice typically held in South Korea. PUAC also noted that Prime Minister Kim Min-seok will lead the funeral committee, with Seoul National University emeritus professor Paik Nak-chung and Democratic Party Chairman Jung Chung-rai also participating in the committee. Lee had traveled to the Vietnamese city on Thursday but collapsed the following day as he prepared to return to South Korea due to worsening flu-like symptoms. Despite undergoing a stent insertion procedure at a nearby hospital, he later died. On Monday, Lee's body was taken to Tan Son Nhat International Airport in Ho Chi Minh City, escorted by Vietnamese police. Officials noted that the Vietnamese foreign ministry facilitated the repatriation process in honor of Lee, coordinating with quarantine and customs authorities. Normally, this process takes at least three days, requiring several documents, including a local death certificate and an embalming certificate. Lee's remains departed Vietnam aboard a Korean Air flight at approximately 0:41 a. m. Tuesday, with his casket draped in the South Korean national flag, Taegeukgi.