The man surnamed Ip left his home at Cheung Wah Estate in Fanling on Tuesday evening and headed to Pak Fu Shan alone. He was wearing a grey short-sleeve T-shirt, dark trousers and carrying a hiking backpack.

His family members had failed to contact him since that evening. They also worried that he didn't bring enough clothes to keep himself warm after the temperature plummeted in the last few days.

Ip's family told media that his two daughter once said they wanted to see the sunrise. They also found Ip had searched for information about Pak Fu Shan on his computer.

Netizens on the other hand spread the news and called on people who had spotted Ip to provide information.

His missing was reported to police around 4pm on Friday.

Police and firemen after analysis predicted that Ip went hiking at Lin Ma Hang in Sha Tau Kok, and further expend the perimeter to nearby areas at Pak Fu Shan.

The search joined by officers from the Civil Aid Service continued this morning. Helicopters were sent to the scene as well to help look for Ip in the area.