A candlelight vigil was held Saturday in Chicago's Bridgeport neighborhood, 15 days since Zhang was last seen getting into this black Saturn Astra in Urbana on the afternoon of June 9. Her father, aunt and boyfriend gathered with supporters.
"This has hit really close to home. Our children go to the University of Illinois to study. Get better. That's what Yingying was doing," said Randy Tom.
Speaking through a translator, Zhang's aunt spoke of a young woman, devoted to her family who arrived at the University of Illinois in April with the dream of becoming a professor in the United States or China.
"She's really good at school. Because of family financials it's not been really good so study has been her only hope to turning her life," said Tina Chu, of the Chinese American Museum of Chicago.
Police have labeled the case a kidnapping and in a meeting on campus Friday, the FBI's special agent in charge of the investigation said finding Zhang is a national priority for the agency.
However, no details were discussed and none have been given to the family either for fear that anything released to the public might be heard by her kidnapper.
"Mr. Zhang just said 'Ying, please hold on. Don't give up. I will find you,'" Chu said.
Crime Stoppers is offering a $40,000 reward for any information that leads to Zhang. It is the largest reward of its kind ever offered by the organization. All of the money has been raised through a GoFundMe account.