I. Compass and map. Even if you don't have a map, it's best to have a compass, especially in places that are difficult to survive, such as the desert Gobi. Without a reference point, it is difficult for people to walk in a straight line, and the result is to go around in circles. Many donkeys are lost and killed in the wild, and it would be much better if they bring a GPS to locate them.
Two, knives. The best combination is a straight-handled survival knife and a multi-function Swiss Army knife. A sturdy knife is an essential tool necessary for building shelters, preparing food, starting fires and countless other tasks.
Three, metal containers (water purification devices): drinking water is more important than eating. With a metal cap or metal can, you can boil water to drink, which sterilizes it and keeps it healthy. Drinking impure water does more harm than good. Therefore, by properly filtering and purifying it, you can avoid many health risks.
Four, survival whistle. When you are lost in the forest, a whistle is the best tool to help you signal. Whistling regularly requires much less energy than yelling, and high-pitched whistles travel farther.