Police are searching a state park in Victoria after a missing man's car was found nearby.
It comes more than a fortnight since the disappearance of Mt Waverley man Yiwei 'Carl' Chu, who was expected to pick up his wife from work on April 11 but never showed up.
The 28-year-old was last seen buying lunch at a fast food restaurant in Notting Hill that day, but the search has since focused on Werribee Gorge State Park, more than 80km away.
Investigators are scouring the area on Saturday after a resident reported seeing Mr Chu's white Toyota Camry in a nearby car park.
Mr Chu hasn't used his mobile phone, bank cards or social media since he was last seen, and police have said there was "potential" for "sinister attachment" to his disappearance.
His wife, Emma Wang, feared her husband may have been murdered, despite being a "calm, quiet, friendly person" who never fought with anyone.
"The only thing that can come to my brain is just about murder or the danger of things," she said.
"I just want him to come home, I can't think too much or think other things."
Ms Wang told AAP Mr Chu's father, Jianqiang, had offered a $10,000 reward for information to help find his son.