The climate here in the mountainous regions of Turkey was drastically different from that of Illiguo; during autumn, temperatures could drop below freezing at night.
The altitude was high, the air was thin and low in oxygen, posing a significant challenge for anyone trekking through the mountains.
Song Heping kept his eyes on the map, using a GPS to aid his journey.
This helped prevent him from getting lost.
Even with a GPS in hand, one couldn't be completely at ease when marching through highland terrain,
because of the terrain's effect, often the GPS signal would get interrupted.
When that happened, you had to rely on a map and compass, using the most primitive methods to determine your position and find the right azimuth and route.
He had been walking for a good ten-plus hours, nearly an entire day.
Song Heping felt both exhausted and thirsty.