Just as Bi Xia said, this story isn't very long, and it's incredibly melodramatic.
According to Hao Xisheng, Mr. Yao took him in when he was ten years old and lived with him since then. From this, we can guess that Mr. Yao lived with Katrina and her family before Hao Xisheng was ten.
The story Katrina told next confirmed this guess.
Originally, Mr. Yao didn't have his current name. He reverted to a Chinese surname after returning to China, but this doesn't mean he was from Country A. He was an overseas Chinese. However, in Country A, he used a foreign name.
Mr. Yao was a famous figure in the antique world of Country A. Many people abroad liked ancient Chinese antiques, so whenever they auctioned or found some valuable ancient artifacts in China, they would invite Mr. Yao to authenticate them.
In their eyes, Mr. Yao had keen insight and extensive knowledge and experience.
