TU HOI
"We filmed at the Hanoi Opera House, a historic landmark built during the French colonial era. We were given rare permission to temporarily clear the VIP room, normally reserved for guests like heads of state or foreign officials. We had to be extremely careful not to damage the original flooring, so we lifted the entire floor surface, covered it with red velvet carpet, and placed a treadmill underneath. The treadmill was later erased in post-production, creating the illusion that Hồng Nhung is walking in place." - Phương Vũ, director