World's oldest Billionaire is 100 years old and attends office everyday

Chang Yun Chung is 100 years old and he is also the oldest living billionaire of the world, enjoyed a long 8 decade long career which is still going on. Chang is the Chairman of emeritus of PIL and he visits his firms Singapore HQ every day even at his age. He said that he cannot stay at home as it will bore him. He maintains a routine in his diary and meets people from all the departments of his company.