귀국해 조언을 받고 연구해 선진 기술, 근면성, '하면 된다'는 신념 등 여러 가지 요인이 있었다는 것을 알아냈다.
Upon returning to Korea, receiving advice and researching, he found out that there were several factors, such as advanced technology, hard work, and the belief that 'you can do it.