The 21-year-old has been missing since Dec. 31 when he sent his father a text message saying he was going hiking, but failed to say where.
Since then, police have searched his computer and found evidence he may have been heading to the mountainous trails on Vancouver's North Shore.
"We had access to information on Mr.Jin's computer that leads us to believe he might have headed to the North Shore, so that's one of the areas we are focusing our investigation," Sgt. Randy Fincham said Monday.
While police believe Jin may have taken public transit from downtown Vancouver, they have not actually confirmed he went to the North Shore.
"Our investigation isn't limited to the North Shore," Fincham said.
Hanes Valley trail searched
Meanwhile, North Shore Rescue has asked volunteers with several other teams including Coquitlam Search and Rescue to join them as they focus their efforts on a particularly rugged trail that has been closed since the fall.
Weather permitting, the searchers will be aided by at least one helicopter on Tuesday.
"We think he has gone along the Hanes Valley Trail," North Shore Rescue spokesperson Peter Haigh said on Monday.
Jin is an avid hiker and is familiar with the North Shore trails. But the Hanes Valley route is difficult during good weather, and treacherous at this time of year.
Search teams have to be careful because recent heavy snow followed by heavy rain has created a high risk of avalanches and mudslides in the area.
Jin's parents searched the trails on their own Sunday, and will be searching the Baden Powell trail on Tuesday.
"They are upset. They are quite concerned," said North Shore Rescue's Allan McMordie on Monday evening.
Tell someone your plans
McMordie said the lack of clear information about Jin's plans makes the search efforts particularly difficult.
He urges other hikers to tell someone where and when they are hiking, even if they just post a message on Twitter or Facebook telling people where they plan to go, when they expect to be back, and what to do if they do not return.
"That way it doesn't go for days before someone reports you missing," McMordie said.
Police describe Jin as:- Asian.
- 5-6" tall, with a slim build.
- May be carrying a black Salomon brand backpack with white stripes on the straps.
Jin is also know to go by the name Leon Joy. Anyone who has seen Jin is asked to call 911 immediately.