FlashBack to 2016
As a child, Schooling would take trips down to Ipoh on long breaks with his parents. But even on holiday, he never missed a swim.
"He would swim at the Ipoh Royal Gold Club, the family's pool and at Ipoh City Council swimming complex. He loved swimming when he was a child. He basically lived in the pool," Ms Yim told Malay Mail Online.
"To him, a day without swimming would be considered strange," said Ms Yim, who last met him at the Southeast Asian Games (SEA) Games in Singapore last year.
Schooling's talent and discipline showed from a very young age, she said.
"I have never seen a boy that age who was so focused and disciplined. Even when he was here on holiday, he would go swimming as early as 5am."
She said Schooling's family would try their best to support him at his competitions. Although the family was not able to be in Rio to cheer him on, she said "we were with him in spirit".
She is hoping to be able to catch the gold-medallist in action next at the 2017 SEA Games in Kuala Lumpur.
Schooling's historic Olympic triumph, she said, should silence his critics - some of whom have called for him to return to Singapore to complete his National Service.
"He was the first Singaporean athlete to receive a deferment because he was training for the Olympics, and some people wanted him to go back. I am so glad that he proved them wrong," she said.
As for what she would say to her nephew, now that he has achieved his goal: "I would tell him to go on and chase after his passion. Go Joe go!"