Qundan Chen, 26, known as Jenny, disappeared while backpacking in Mexico in spring 2016. She left Seattle after moving to the United States from China in 2013 and began a solo trip in early March. Her last confirmed contact with family and friends was April 11, 2016, when she was in Oaxaca. She planned to meet her husband, Jonathan Reinhard, in Cancun on April 15 but never arrived.

A private investigator hired by Reinhard traced her from Oaxaca City to Juchitan on April 11, where she stayed with a local family. On April 12 she was seen attempting to hitch a ride on Highway 185 toward Cancun. Eyewitnesses say a Corona beer truck stopped and the driver offered her a ride; she was seen leaving with that driver and was not seen again. Efforts to get cooperation from the truck company were initially resisted but later improved. The NamUs file remains active and no significant breakthrough has been reported.

If anyone saw Qundan in Juchitan or on Highway 185 on April 12, 2016, or has information about the Corona truck or its driver, please come forward.