Yingying Zhang's father Ronggao Zhang, left, and her friend Xiaolin Hou carry the banner as community members join together to walk for Yingying, a Chinese scholar who went missing three weeks ago, Thursday, June 29, 2017, in Urbana, Ill. Illinois students and others from the wider community are gathering at the Urbana-Champaign campus to show support for the Chinese scholar who disappeared three weeks ago. (Holly Hart/The News-Gazette via AP)
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