For the past five weeks, Jamie Ding has wowed and charmed television viewers with his vast knowledge and friendly demeanor while becoming one of the most successful contestants in “Jeopardy!” history.

While his Detroit-area family has known that Ding, who grew up in Michigan, is smart, they never anticipated that he would notch 25 consecutive victories through Thursday, going into Friday contest. The 25 wins are the fifth-highest total in the history of the long-running TV game show.

“We know he knows a lot, but not this much,” said his father, Yuchuan Ding.

Jamie, 33, said he cherishes the time he spent in Michigan and hasn’t left the state behind entirely — his phone number still has a 313 area code, after all.

“Michigan was and is a wonderful place to be,” he said. “The emotional turning point of my first game was getting the clue about Belle Isle. After that, I felt like I was in the swing of things.”

Jamie’s younger sister, Jessie, 30, said she originally feared that Jamie would “crash and burn” on the show. But when he got a “Jeopardy!” question correct in which the answer was Detroit, she said both she and Jamie knew he would be fine.

“I didn’t want him to go on national TV and embarrass himself,” said Jessie, adding with a laugh: “But he didn’t.”

As of Thursday, Jamie has earned $702,000 on “Jeopardy!” — the sixth most prize winnings ever compiled by a single contestant. He has answered 783 clues correctly, compared with 61 incorrect responses as of Wednesday’s episode, according to the online database The Jeopardy! Fan.

Jamie’s mother, Ning Yan, said many people have reached out to the family as Jamie continued to pile up win after win.

“Friends, family, everybody, classmates … tell us they are watching,” Ning Yan said. “It’s very exciting.”

Before he became TV’s latest game show star, Ding was one of the brightest youths in Metro Detroit.

“He started reading at the age of 3, and we provided him with all the possible materials we could,” Yuchuan Ding said. “He’s always been very curious about everything.”

The elder Ding, who is a professor of neurosurgery at Wayne State University in Detroit, has vivid memories of young Jamie reading every informational plaque during family outings to the zoo. And at age 4 or 5, his dad said, Jamie saved his family some strife when he was able to understand the rules posted on a “no parking” sign and told his parents to move their car.

“When he’s with us, we can’t do anything wrong,” Yuchaun said with a smile. “He’s our guide.”

Jamie Ding’s appearance turns parents into ‘Jeopardy!’ fans

The family has been watching Ding every night from their home in Grosse Pointe Shores, where Jamie and Jessie attended Grosse Pointe public schools from elementary through high school.

Yuchuan said he wasn’t familiar with “Jeopardy!” before Jamie became one of its longest-reigning champs ever. But now he and his wife are regular viewers.

Jamie’s parents are originally from Beijing, where Yuchaun found career success as a cosmetic surgeon. He and wife, Ning Yan, left the country in 1989 after the political violence that erupted at Tiananmen Square, which the U.S. State Department said resulted in hundreds to thousands of Chinese protesters being killed by the People’s Liberation Army.

After residing for several years in Australia, where Jamie was born and Yuchuan earned his doctorate, the young family moved to Tennessee. There, Yuchuan was a research fellow at Vanderbilt University while Ning Yan worked in child care.

The family moved to Michigan in 1998, when Yuchuan started work at Wayne State University and Ning Yan joined the Detroit public school system. She has since retired from teaching math at Cass Technical High School.

While in the Grosse Pointe school system, Jamie competed in the Scripps National Spelling Bee, the National Geographic Bee and the National Academic Quiz Tournaments’ high school championship — while still graduating a full year early.

“I remember Jamie well as a brilliant young man and excellent student,” said Tim Bearden, who was the principal at Grosse Pointe North High School when Jamie was a student and is now the superintendent of West Ottawa Public Schools. “I’m not surprised at all at his success, and I’m super happy for him!”

During Jamie’s trip to Washington, D.C., to participate in the 2004 Geographic Bee, he briefly met Alex Trebek, the late, longtime host of “Jeopardy!”

Neurologist father weighs in on Jamie’s government work

After graduating from high school in 2009, Ding matriculated at prestigious Princeton University in New Jersey, graduating in 2013 with a degree in molecular biology.

He remained in New Jersey after earning his degree and now, at age 33, works for the state’s Housing and Mortgage Finance Agency, helping to administer the low-income housing tax credit program. His work involves managing the review process that determines whether mixed-income housing projects are eligible for tax credits.

Yuchuan, who is an internationally recognized expert in stroke therapy, traumatic brain injury and thermal injury research, said he didn’t necessarily expect his son to wind up as a bureaucrat working in government housing, but he’s proud of the work Jamie does nonetheless.

“I know it’s important …, and he really likes the work,” Yuchuan said.

When he’s not monitoring New Jersey’s housing projects, he’s attending law school as a part-time student.

That, or winning tens of thousands of dollars each night on TV.

He says he couldn’t have accomplished his impressive streak without his family’s support.

“My family are absolute heroes,” he said. “I would not be where I am today without their unconditional love and support. I’m very glad that I got to do something grand to make them proud.”

Jamie is still a long way from matching current “Jeopardy!” host Ken Jennings’ 2004 streak of 74 consecutive victories, but he’s already tied him in one area. During one episode last month, he recorded 45 correct answers in a single episode, tying Jennings’ mark.

Episodes are taped months in advance, so the fate of Jamie’s streak is already sealed. But that doesn’t make the Dings’ experience of seeing their child or brother rack up more winnings every night any less exciting.

Jessie was in the audience at the “Jeopardy!” set in Culver City, California, for Jamie’s run. While it is now fun to remember moments she has forgotten, Jessie said, “Sometimes it still gets a little nerve-wracking even though I know the outcome.”

“Even though I know the results,” Yuchuan added, “I still get very nervous.”