Thanks Chateau.
In that case, all of these stuffs are just one episode.
Sunset is around 6:39PM.
After the bug eating task, they go to this clue box and grab a yellow bag.
Do a matching item task and grab a bus ticket.
Take a bus to Chiang Mai. It's about 8-9 hours by bus from Bangkok.
The detour is to mow the lawn or off-road racing.
The Roadblock is a mystery.
Pitstop is in the Royal Flora Garden.
Voila.