S. Korean lawyer Dr. Oh Byoung-Joo (left) introduces his new book "Secret Key to Hopeful Future" in Seoul on Jan. 14, 2020 while ex-S. Korean Prime Minister Han Duck-Soo (2nd from right), ex-Rep. Kim Chang-Joon (right) of US House of the Representatives, and ex-Construction Minister Oh Jang-Sub (3rd from right) of S. Korea look on at Dr. Oh's book signing ceremony.

Dr. Oh Byoung-Joo, South Korea's seasoned lawyer and politician, celebrated his new book titled “Secret Key to Hopeful Future," in a special ceremony held at Sahyang Gymnasium of Seoul National University of Education in Seocho-dong, the southern part of Seoul on Jan. 14, 2020.

The 63-year-old invited hundreds of high-profile guests from nearly all walks of life to his book signing event held at 4 p.m. on the day.

Among the prominent participants were scores of lawyers and prosecutors of Dr. Oh's friends or former colleagues. Dr. Oh served as a prosecutor himself for many years in the past.

Top dignitaries included former South Korean Prime Minister Han Duck-Soo, former Rep. Kim Chang-Joon of US House of the Representatives, and former Construction Minister Oh Jang-Sub of South Korea. They all made a congratulatory speech one by one.

Dr. Oh Byoung-Joo's New Book "Secret Key to Hopeful Future" — an autobiography deals with a series of his own personal experiences and episodes. He also explores human existence and mysteries of universe and the nature. Photo by Min Dong-Hyun, editor in chief of The Seoul Times

“Secret Key to Hopeful Future," an autobiography deals with a series of his own personal experiences and episodes. He also explores human existence and mysteries of universe and the nature.

A graduate of the elite Seoul National University's Law School, Dr. Oh also studied at UC Berkeley's Law School. He earned his PhD in law from Hanyang University in Seoul.

He passed successfully through South Korean bar examination to become a prosecutor and lawyer. He also passed through the government's exam for high-level public officer qualification.

Following years of his service as a public prosecutor, he also built his career as a government administrator.

He served as a vice mayor of Gongju, South Chungcheong Province. He also served as vice minister of Prime Minister's Office.