That mentoring has proven vital to Teo as he's risen up the ranks at PIL, particularly with regard to managing his temper in high pressure situations.
"When I was younger, I was more bad-tempered, so I was more (of) a hard leader," said Teo. "But my father taught me one thing, in Chinese, it's 'yi de fu ren' — that means you want people to obey you, not because of your authority, not because of your power, or because you are fierce, but more because of your integrity, your quality, that people actually respect you and listen to you."
"So, 'yi de fu ren' is a very difficult thing to do, but I think I'm slowly learning it."
That proved especially important in 2009 when, as managing director, Teo had to manage the hijacking of one of the company's vessels by pirates off the coast of East Africa. It took 75 days and an undisclosed sum to eventually secure the crew's release.
"In any business, especially shipping, there's a lot of unknown," said Teo. "There can be political (issues), there can be technical issues, there can be accidents. It doesn't help losing your temper and getting all worked up. So staying calm is something that I learnt from him and I'm still learning from him."
For Chang's part, it's that mentality that has perhaps kept him happy in his role for so long.
"I never lose my temper," he said. "(I) cannot. When you lose your temper, you just cannot control yourself."
Source: Make It, CNBC.com