Whatever you do, keep an eye on your watch.
Clear immigration, take a blue taxi to Tung Chung and select one of the trails. https://www.wikiloc.com/trails/hikin...nds/tung-chung

Remember one of the many taxi call numbers for your return to the airport. Once back through security, do your fellow passengers a favor and have a shower at one of the lounges. There's Zara on the air side should you need a new change of clothes.

Luggage can be stored at the airport.
https://www.hongkongairport.com/en/p...aggage-storage

Enjoy!