Choi Sang-mok, veteran economic technocrat, is South Korea's second acting president in weeks. Who is he?

Veteran economic technocrat hoi Sang-mok has been made South Korea's second acting president in two weeks. He has served for more than 30 years at the finance ministry. Choi has pledged unlimited liquidity to calm financial markets and has vowed an all-out effort to stabilise state affairs and overcome the current crisis.